1980 Iowa highway transfer of jurisdiction#IA 19610106
{{Short description|none}}
{{Use mdy dates|date=April 2014}}
{{Infobox state highway system
|title=Iowa Primary Highway System
|map={{maplink|frame=yes|plain=yes|frame-align=center|frame-width=300|frame-height=240|type=line|from=1980 Iowa highway transfer of jurisdiction.map}}
|map_custom=yes
|map_notes=Highways that changed jurisdiction around 1980
{{legend|#c00|Removed highways}}{{legend|#00f|Renumbered highways}}{{legend|#0f0|Added highways}}
|statehwy=Highway X (IA X or Iowa X)
|us=U.S. Highway X (US X)
|interstate=Interstate X (I-X)
|notes=Primary highways in Iowa are generally state-maintained.
|links=IA
}}
Beginning in 1979 and lasting through the early 1980s, a series of agreements between the Iowa Department of Transportation and individual county boards of supervisors led to a mass transfer of jurisdiction of several state highways in Iowa. County boards of supervisors were asked to convene functional classification boards in order to review the classification all of the highway miles within each respective county. Control of roads that were classified as trunk roads or trunk collector roads were transferred to the counties, while roads classified as arteries or arterial collectors were transferred to the state department of transportation. The vast majority of transfers took place in 1980.
Background
The 67th Iowa General Assembly passed a bill in 1978 that changed how the state department of transportation (DOT) classified highways and how they were funded throughout the state. The bill enacted an existing framework for county boards of supervisors to create reclassification boards that could appeal to a state board if certain changes to the road network were not satisfactory. The state's road use tax fund, which is the mechanism for allocating funds to the different levels of government for different levels of road, had both its inputs and outputs modified. The general fuel tax was raised from {{convert|7|to|8+1/2|¢/USgal}} for 1978 (equivalent to {{convert|{{inflation|US|7|1978}}|to|{{inflation|US|8.5|1978}}|¢/USgal}} in {{inflation/year|US}}), and to {{convert|10|¢/USgal|abbr=on}} for 1979 (equivalent to {{convert|{{inflation|US|10|1979}}|¢/USgal|abbr=on}} in {{inflation/year|US}}).{{inflation/fn|US}}{{cite act |type=Chapter |index=1108 |date=1978 |article=of the 67th General Assembly |article-type=Laws |legislature=Iowa General Assembly |title=Roads and Fuel Taxes |pages=575-588 |url=https://www.legis.iowa.gov/docs/publications/iactc/67.2/CH1108.pdf|access-date=August 19, 2020}}
The state was attempting to offset the effects the 1970s energy crisis and the 1973–75 recession which strained state budgets by reducing income due to reduced demand for gasoline and increasing inflation.{{cite news |last1=Evans |first1=Randy |title=Officials Chafe at 'Inheriting' State Highways |url=https://www.newspapers.com/clip/57597413/officials-chafe-at-inheriting-state/ |access-date=August 19, 2020 |work=The Des Moines Register |date=August 17, 1980 |pages=1,12}} The idea was for the DOT to save operational money by offloading minor highways to the respective counties. In 1979, Iowa had the 9th largest public road system in the United States with over {{convert|113000|mi|km}} of roadways, {{convert|10000|mi|km}} of which were primary highways, comprising Interstate Highways, U.S. Highways, and state highways. State planners sought to offload nearly one-third of the primary system. Naturally, county officials, whose road budgets were similarly strained, balked at the idea.{{cite news |last1=Piller |first1=Dan |title=Roads: An Explosive Issue for the 1980s |url=https://www.newspapers.com/clip/57596810/roads-an-explosive-issue-for-the-1980s/ |access-date=August 19, 2020 |work=The Des Moines Register |date=July 29, 1979 |page=1 |via=Newspapers.com}} {{open access}}
The Iowa Code provided a manner for determining the class of a particular highway. Each county was to appoint a three-member board, one of whom was to be a state DOT employee, one a county engineer or supervisor, and the other a municipal leader chosen by a majority of mayors in the county. The board was to classify each mile of roads and streets in the county into one of twelve categories. Only three categories applied to primary highways–freeways and expressways, arterials, and arterial connectors. The freeway-expressway and arterial systems had limits on total mileage, {{convert|2660|and|3500|mi|km}}, respectively. The only other requirement of the reclassification boards was to ensure network continuity between counties.{{cite book |date=1978 |article=Establishment, Alteration, and Vacation of Highways |last=1979 Iowa Code |author-link=Code of Iowa |title=§§306.1–306.42 |pages=1397–1405 |url=https://www.legis.iowa.gov/docs/shelves/code/ocr/1979%20Iowa%20Code.pdf}} Ultimately, these boards found about {{convert|1000|mi|km}} of minor highways that were on the primary system and {{convert|400|mi|km}} of major highways on the secondary system.
County officials were not keen on the idea of taking over more highway miles from the state when their own road budgets were tight. Clarke County officials sued the state classification board when it suggested the county take over an {{convert|11|mi|km|adj=on}} portion of U.S. Highway 69 (US 69). They felt the DOT was attempting to dump unwanted highway miles, which were also in poor condition, on a county unwilling to accept them. Some counties felt pressure to accept roads from the state that the DOT had not maintained adequately.{{cite news |last1=Hoffmann |first1=Rep. Betty |title=Legislative report... |url=https://www.newspapers.com/clip/57686336/legislative-report/ |access-date=August 20, 2020 |work=The Muscatine Journal |date=March 18, 1980 |page=4 |via=Newspapers.com}} {{open access}} Grundy County had some success by reclassifying some roads slated for transfer, such as Iowa Highway 214 (Iowa 214) into Wellsburg. That highway was reclassified as an arterial collector extension, keeping in spirit with an agreement it had with the DOT to maintain the highway until "Interstate 520" was built.{{cite news |last1=Schmidt |first1=Vernice |title=Grundy County Wins First Round in Battle on Highway Jurisdiction |url=https://www.newspapers.com/clip/57597026/grundy-county-wins-first-round-in/ |access-date=August 20, 2020 |work=The Waterloo Courier |date=August 31, 1979 |page=16 |via=Newspapers.com}} {{open access}} Other counties had appeals heard at the DOT headquarters in Ames.{{cite news |last1= |title=Lyon, Sioux Roads Reshuffle Talk Set |url=https://www.newspapers.com/clip/57597865/lyon-sioux-roads-reshuffle-talk-set/ |access-date=August 20, 2020 |work=Sioux City Journal |date=December 13, 1980 |page=3 |via=Newspapers.com}} {{open access}}
Construction of new highways, such as Interstate 380 (I-380) would cause a chain reaction in other state highways. It was predicted in 1979 that opening I-380 in the Cedar Rapids area would cause Iowa 150 to lose its status as a primary highway because the route ran roughly parallel to the planned Interstate Highway's corridor.{{cite news |last1= |title=Section of Highway 150 May Lose Primary Status |url=https://www.newspapers.com/clip/57596931/section-of-highway-150-may-lose-primary/ |access-date=August 20, 2020 |work=The Gazette |date=August 19, 1979 |location=Cedar Rapids |page=20A |via=Newspapers.com}} {{open access}} Indeed, when I-380 opened to traffic in 1984, Iowa 150 was rerouted away from Cedar Rapids over Iowa 101 to Vinton. One section of Iowa 150 along Collins Road in Cedar Rapids was still classified as an arterial connector; it became Iowa 100.
One provision in the Iowa Code required whichever agency maintained a section of highway previously to either repair the highway in question or to pay an appropriate amount of money equal to the costs of repairing the road to the agency receiving the road.{{sfnp|1979 Iowa Code|1978|p=1400}} In Johnson County, state and county officials had difficulty reaching an agreement on a former segment of Iowa 1, by then renumbered Iowa 979. County officials wanted the state to take over County Road W66 (CR W66) from I-80 to the west overlook of Coralville Lake. The state countered with an offer to pay to upgrade Iowa 979 as well as have the county take over three other highways in the county.{{cite news |last1=Bunton |first1=Kristie |title=Local Road: The Old Highway Nobody Wants |url=https://www.newspapers.com/clip/57687403/local-road-the-old-highway-nobody-wants/ |access-date=August 20, 2020 |work=Iowa City Press-Citizen |date=January 18, 1984 |page=2 |via=Newspapers.com}} {{open access}} The two sides were not any closer 18 months later when the DOT was ready to open a new four-lane US 218 south of Iowa City.{{cite news |last1=Walsh |first1=Tom |title=IDOT Officials May Hope to Open Highway, Close Deal |url=https://www.newspapers.com/clip/57689199/idot-officials-may-hope-to-open/ |access-date=August 20, 2020 |work=The Gazette |date=June 25, 1985 |location=Cedar Rapids |page=11 |via=Newspapers.com}} {{open access}} The routes for which no agreement could be made were ultimately kept by the DOT and assigned new route numbers, as was the case with Iowa 979.
Routes removed
Lengths represent the distances removed from the state highway system
{{Routelist top|length_ref={{IowaDOT|year=1978|2020-08-19}}}}
{{Routelist row
|state=IA
|type=IA 1961
|route=27
|dab=1930–1980
|length_mi=6.86
|terminus_a=Alvord
|terminus_b=US 75 near Rock Rapids
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=42
|length_mi=4.18
|terminus_a=US 275 / Iowa 2 near Sidney
|terminus_b=Riverton
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=43
|length_mi=1.58
|terminus_a=Ringsted
|terminus_b=Iowa 15 near Ringsted
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=47
|length_mi=0.82
|terminus_a=Iowa 14 near Allison
|terminus_b=Allison
|established=1951
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=54
|length_mi=2.99
|terminus_a=Marble Rock
|terminus_b=Iowa 14 east of Marble Rock
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=77
|length_mi=7.80
|terminus_a=Iowa 78 at Richland
|established=1920
|decommissioned=2003
|notes=Segment into Keota remained
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=79
|dab=1920–1980
|length_mi=1.74
|terminus_a=Iowa 2 near Bonaparte
|terminus_b=Bonaparte
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=84
|length_mi=2.13
|terminus_a=The Eastern Iowa Airport
|terminus_b=I-380 near Cedar Rapids
|established=1943
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=86
|dab=1945–1980
|length_mi=0.47
|terminus_a=Fertile
|terminus_b=Iowa 9 at Fertile
|established=1945
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=87
|length_mi=4.06
|terminus_a=US 69 west of Elkhart
|terminus_b=Elkhart
|established=1920
|decommissioned=1983
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=88
|length_mi=8.01
|terminus_a=US 61 / Iowa 2 in Fort Madison
|terminus_b=Iowa 16 in Denmark
|established=1940
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=89
|length_mi=7.69
|terminus_a=Iowa 141 near Woodward
|established=1946
|decommissioned=1980
|notes=Replaced by an extended Iowa 210
}}
{{routelist row
|state=IA
|type=IA 1961
|route=90
|length_mi=16.32
|terminus_a=I-80 in Dallas County
|terminus_b=I-35 in Des Moines
|established=1932
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=91
|dab=1940-1980
|length_mi=4.18
|terminus_a=Ledyard
|terminus_b=US 169 near Ledyard
|established=1940
|decommissioned=1980-05
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1961
|route=95
|length_mi=3.70
|terminus_a=Carbon
|terminus_b=Iowa 148 north of Corning
|established=1932
|decommissioned=1983
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1961
|route=101
|length_mi=15.56
|terminus_b=Iowa 150 north of Urbana
|established=1920
|decommissioned=1984
|notes=Replaced by a relocated Iowa 150
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=102
|dab=1920–1980
|length_mi=1.82
|terminus_a=Hawkeye
|terminus_b=US 18 near Hawkeye
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=104
|length_mi=1.53
|terminus_a=Woodburn
|terminus_b=US 34 near Woodburn
|established=1927
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=106
|length_mi=8.98
|terminus_a=Iowa 107 in Clear Lake
|terminus_b=US 65 in Mason City
|established=1920
|decommissioned=1980
|notes=
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=108
|length_mi=1.18
|terminus_a=Delta
|terminus_b=Iowa 92 near Delta
|established=1923
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=112
|length_mi=5.19
|terminus_a=Volga
|terminus_b=Iowa 13 near Osborne
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=114
|length_mi=9.20
|established=1969-01
|decommissioned=1981
|terminus_a=Iowa 92 near West Chester
|terminus_b=Iowa 22 at Wellman
|notes=Previously Iowa 81
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=119
|length_mi=1.04
|terminus_a=Dorchester
|terminus_b=Iowa 76 near Dorchester
|established=1923
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=120
|length_mi=0.80
|terminus_a=Stanton
|terminus_b=US 34 near Stanton
|established=1924
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=123
|length_mi=0.45
|terminus_b=Rome
|established=1970
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=125
|length_mi=3.26
|terminus_a=Salem
|terminus_b=US 218 near Salem
|established=1924
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=126
|length_mi=0.97
|terminus_a=US 6 near Mitchellville
|terminus_b=Mitchellville
|established=1924
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=134
|dab=1935–1980
|length_mi=4.06
|terminus_a=US 65 near Hampton
|terminus_b=Geneva
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=135
|length_mi=1.96
|terminus_a=Montour
|terminus_b=US 30 near Montour
|established=1954
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=152
|dab=1926–1980
|length_mi=1.31
|terminus_b=Murray
|established=1926
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=155
|length_mi=3.05
|terminus_a=Nodaway
|terminus_b=US 34 near Nodaway
|established=1933
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=156
|length_mi=0.33
|terminus_a=Bussey city limits
|terminus_b=Bussey
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=159
|length_mi=1.83
|terminus_a=Iowa 92 near Harper
|terminus_b=Harper
|established=1929
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=166
|length_mi=0.57
|terminus_a=Hastings
|terminus_b=US 34 near Hastings
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=167
|length_mi=3.21
|terminus_a=Doon
|terminus_b=US 75 near Doon
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=168
|length_mi=2.70
|terminus_a=Iowa 83 near Minden
|terminus_b=Shelby
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=171
|length_mi=1.05
|terminus_a=Elberon
|terminus_b=Iowa 21 near Elberon
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=172
|length_mi=4.23
|terminus_a=Elgin
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=177
|length_mi=3.20
|terminus_b=Elgin
|established=1937
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=178
|length_mi=0.98
|terminus_a=Iowa 9 near Little Rock
|terminus_b=Little Rock
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=179
|length_mi=0.76
|terminus_b=Klemme
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=180
|length_mi=2.46
|terminus_a=Hayesville
|terminus_b=Iowa 149 near Hayesville
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=186
|dab=1930–1980
|length_mi=3.27
|terminus_a=US 34 near Prescott
|terminus_b=Prescott
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=189
|length_mi=1.00
|terminus_a=Bridgewater
|terminus_b=Iowa 92 north or Bridgwater
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=190
|length_mi=7.46
|terminus_a=Fairbank
|terminus_b=Iowa 150 near Oelwein
|established=1931
|decommissioned=1980
|notes=Replaced by Iowa 281
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=198
|length_mi=0.43
|terminus_a=Garrison
|terminus_b=Garrison city limits
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=199
|length_mi=0.54
|terminus_a=Van Horne city limits
|terminus_b=Van Horne
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=200
|length_mi=0.59
|terminus_a=Keystone city limits
|terminus_b=Keystone
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=203
|length_mi=8.78
|terminus_a=Terril
|terminus_b=Iowa 9 near Superior
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=213
|length_mi=3.72
|terminus_a=Blakesburg
|terminus_b=US 34 north or Blakesburg
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=216
|length_mi=1.70
|terminus_a=Iowa 5
|terminus_b=Exline
|established=1931
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=219
|length_mi=1.53
|terminus_a=Iowa 9 near Lake Park
|terminus_b=Lake Park
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=221
|length_mi=2.44
|terminus_a=US 69 near Story City
|terminus_b=I-35 near Story City
|established=
|decommissioned=2003
|notes=Segment from I-35 to Roland remained
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=222
|length_mi=14.72
|terminus_a=Iowa 15 near Ottosen
|terminus_b=Livermore
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=226
|length_mi=10.78
|terminus_b=Titonka
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=231
|dab=1931–1981
|length_mi=1.83
|terminus_a=Iowa 10 near Ireton
|terminus_b=Ireton
|established=1931
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=232
|length_mi=1.99
|terminus_a=Earlham
|terminus_b=I-80 near Earlham
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=237
|length_mi=1.23
|terminus_a=Ocheyedan
|terminus_b=Iowa 9 near Ocheyedan
|established=1931
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=241
|length_mi=0.99
|terminus_a=Readlyn
|terminus_b=Iowa 3 near Readlyn
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=243
|dab=1931–1980
|length_mi=7.97
|terminus_a=Iowa 140 near Kingsley
|terminus_b=Pierson
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=244
|dab=1931–1980
|length_mi=1.96
|terminus_a=Henderson
|terminus_b=US 59
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=246
|length_mi=3.26
|terminus_b=La Motte
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=248
|length_mi=0.49
|terminus_a=Independence State Hospital
|terminus_b=US 20 in Independence
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=250
|length_mi=0.59
|terminus_a=Lakota
|terminus_b=US 169 / Iowa 9 near Lakota
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=251
|length_mi=1.71
|terminus_a=St. Charles
|terminus_b=I-35 near St. Charles
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=254
|dab=1969–1980
|length_mi=7.91
|terminus_a=Iowa 9 near Buffalo Center
|established=1969
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=255
|length_mi=2.26
|terminus_a=Orchard
|terminus_b=US 218 near Orchard
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=256
|length_mi=0.80
|terminus_a=Iowa 17 near Corwith
|terminus_b=Corwith
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=259
|length_mi=0.45
|terminus_a=Tingley city limits
|terminus_b=Tingley
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=262
|length_mi=1.99
|terminus_b=Galt
|established=1933
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=263
|dab=1933–1980
|length_mi=2.02
|terminus_a=Coulter
|terminus_b=Latimer
|established=1933
|decommissioned=1980
|notes=Double spur route with Iowa 3
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=264
|length_mi=2.39
|terminus_a=Linn Grove
|terminus_b=Iowa 10 near Linn Grove
|established=1933
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=266
|length_mi=0.12
|terminus_a=Weldon city limits
|terminus_b=Weldon
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=267
|length_mi=1.19
|terminus_a=Iowa 93 near Randalia
|terminus_b=Randalia
|established=1934
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=269
|length_mi=3.01
|terminus_a=Iowa 16 near Stockport
|terminus_b=Stockport
|established=1934
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=270
|length_mi=1.80
|terminus_a=Iowa 16 near Hillsboro
|terminus_b=Hillsboro
|established=1934
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=271
|length_mi=0.84
|terminus_b=Yale
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=277
|length_mi=6.24
|terminus_a=Numa
|terminus_b=Iowa 5 near Centerville
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=278
|length_mi=2.05
|terminus_a=Rathbun
|terminus_b=Iowa 5 near Rathbun
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=279
|length_mi=0.72
|terminus_a=Atkins city limits
|terminus_b=Atkins
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=284
|length_mi=5.58
|terminus_a=Aurora
|terminus_b=Iowa 187 at Lamont
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=287
|length_mi=0.42
|terminus_a=Newhall city limits
|terminus_b=Newhall
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=288
|length_mi=4.58
|terminus_b=Plymouth
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=289
|dab=1935–1980
|length_mi=6.14
|terminus_a=Alta Vista
|terminus_b=US 63 near Lourdes
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=290
|length_mi=1.99
|terminus_a=Farmersburg
|terminus_b=Iowa 13 near Farmersburg
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=291
|length_mi=1.01
|terminus_b=US 30 near Low Moor
|terminus_a=Low Moor
|established=1935
|decommissioned=1979
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=292
|length_mi=3.17
|terminus_a=Linden
|terminus_b=Iowa 44
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=293
|length_mi=1.42
|terminus_a=Iowa 90 near Van Meter
|terminus_b=Van Meter
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=295
|length_mi=5.09
|terminus_a=Westgate
|terminus_b=Iowa 150 near Maynard
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=296
|dab=1935–1980
|length_mi=4.44
|terminus_a=CR C24 near Wadena
|terminus_b=Iowa 56 near Wadena
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=302
|length_mi=3.00
|terminus_a=Thor
|terminus_b=Iowa 3 near Thor
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=303
|length_mi=3.51
|terminus_a=US 34 near Fairfield
|terminus_b=Libertyville
|established=1935
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=304
|length_mi=1.59
|terminus_a=Iowa 78 near Ollie
|terminus_b=Ollie
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=309
|length_mi=2.32
|terminus_a=Beacon
|terminus_b=Iowa 137 in Oskaloosa
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=311
|length_mi=0.55
|terminus_a=Liscomb
|terminus_b=Liscomb city limits
|established=1935
|decommissioned=1989
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=312
|dab=1935–1980
|length_mi=5.70
|terminus_a=Iowa 9 near Riceville
|terminus_b=McIntire
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=313
|length_mi=2.03
|terminus_a=Melvin city limits
|terminus_b=Melvin
|established=1935
|decommissioned=2002
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=317
|length_mi=0.81
|terminus_a=US 65 near Zearing
|terminus_b=Zearing
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=318
|length_mi=5.51
|terminus_a=Clutier
|terminus_b=Iowa 21 near Clutier
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=319
|length_mi=0.50
|terminus_a=Gravity
|terminus_b=Iowa 148 at Gravity
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=323
|length_mi=3.74
|terminus_a=Iowa 17 near Woolstock
|terminus_b=Woolstock
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=325
|length_mi=0.47
|terminus_a=Spillville
|terminus_b=Spillville city limits
|established=1935
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=326
|length_mi=2.18
|terminus_a=Bristow
|terminus_b=Iowa 3 near Bristow
|established=1935
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=328
|length_mi=2.29
|terminus_b=Galva
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=329
|length_mi=4.85
|terminus_b=Pilot Mound
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=332
|length_mi=1.00
|terminus_a=Pilot Knob State Park
|terminus_b=Iowa 9 near Forest City
|established=1935
|decommissioned=1980
|notes=Park access road
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=334
|dab=1935–1980
|length_mi=1.87
|terminus_a=US 63 near Frederika
|terminus_b=Frederika
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=335
|dab=1935–1980
|length_mi=0.64
|terminus_a=Iowa 141 near Dawson
|terminus_b=Dawson
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=336
|length_mi=2.48
|terminus_a=Iowa 150 near Rowley
|terminus_b=Rowley
|established=1936
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=337
|dab=1936–1980
|length_mi=3.36
|terminus_a=Iowa 9 near Grafton
|terminus_b=Grafton
|established=1936
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=342
|dab=1936–1980
|length_mi=0.95
|terminus_a=Iowa 141 near Jamaica
|terminus_b=Jamaica
|established=1936
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=343
|length_mi=1.01
|terminus_a=Iowa 333 near Northboro
|terminus_b=Northboro
|established=1937
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=351
|length_mi=0.86
|terminus_a=Rembrandt
|terminus_b=US 71 near Rembrandt
|established=1938
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=352
|length_mi=0.75
|terminus_a=US 71 near Truesdale
|terminus_b=Truesdale
|established=1938
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=353
|length_mi=0.35
|terminus_a=Rowan
|terminus_b=Iowa 3 at Rowan
|established=1938
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=356
|dab=1938–1981
|length_mi=6.37
|terminus_a=Packwood
|terminus_b=Iowa 1 near Packwood
|established=1938
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=358
|length_mi=1.55
|terminus_a=Whittemore
|terminus_b= US 18 / Iowa 15 near Whittemore
|established=1938
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=362
|dab=1938–1980
|length_mi=1.17
|terminus_a=Macedonia
|terminus_b=US 59 near Macedonia
|established=1938
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=364
|length_mi=0.74
|terminus_a=Cota Creek
|terminus_b=Harpers Ferry
|established=1938
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=365
|length_mi=1.07
|terminus_a=Tracy
|terminus_b=Iowa 92 near Tracy
|established=1939
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=367
|length_mi=3.39
|terminus_a=Rutland
|terminus_b=US 169 near Humboldt
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=369
|length_mi=5.54
|terminus_a=Iowa 2 near Moulton
|terminus_b=Unionville
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=374
|dab=1942–1980
|length_mi=7.99
|terminus_a=US 71 near Sioux Rapids
|terminus_b=Webb
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=377
|length_mi=0.51
|terminus_a=Harbor Drive in Sioux City
|terminus_b=Iowa 970 in Sergeant Bluff
|established=1942
|decommissioned=1980
|notes=Airport access road
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=379
|length_mi=4.59
|terminus_a=Joice
|terminus_b=Iowa 105 near Lake Mills
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=381
|length_mi=0.67
|terminus_a=Iowa 254 near Rake
|terminus_b=Rake
|established=1954
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=387
|length_mi=0.52
|terminus_a=Davenport Municipal Airport
|terminus_b=US 61 3 miles north of Davenport
|established=1951
|decommissioned=1979
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=388
|length_mi=0.35
|terminus_a=Calumet
|terminus_b=US 59 at Calumet
|established=1946
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=390
|dab=1946–1980
|length_mi=0.74
|terminus_a=Iowa 10 near Marathon
|terminus_b=Marathon
|established=1946
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=393
|length_mi=2.40
|terminus_a=Ionia
|terminus_b=US 18 near Ionia
|established=1948
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=394
|dab=1948–1980
|length_mi=1.72
|terminus_a=Iowa 2 near Denmark
|terminus_b=Iowa Army Ammunition Plant southern entrance
|established=1948
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=395
|length_mi=0.53
|terminus_a=Melbourne
|terminus_b=Iowa 330 near Melbourne
|established=1948
|decommissioned=1983
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=396
|length_mi=0.52
|terminus_a=Iowa 175 near Farnhamville
|terminus_b=Farnhamville
|established=1954
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=398
|length_mi=1.24
|terminus_a=Brooklyn
|terminus_b=US 6 near Brooklyn
|established=1956
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=400
|length_mi=4.54
|terminus_a=Truro
|terminus_b=I-35 near Truro
|established=1958
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=403
|dab=1958–1980
|length_mi=0.70
|terminus_a=Cushing
|terminus_b=US 20 near Cushing
|established=1958
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=405
|length_mi=0.24
|terminus_a=Lone Tree
|terminus_b=Lone Tree city limits
|established=1958
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=408
|length_mi=7.40
|terminus_a=US 169 near Lu Verne
|terminus_b=Lu Verne
|established=1957
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=412
|length_mi=4.72
|terminus_b=US 218 in Waterloo
|established=1960
|decommissioned=1983
|notes=San Marnan Drive in Waterloo
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=413
|length_mi=3.95
|terminus_a=US 20 in Fort Dodge
|terminus_b=Fort Dodge Municipal Airport
|established=1960
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=424
|dab=1961–1980
|length_mi=0.44
|terminus_a=Britt city limits
|terminus_b=US 18 near Britt
|established=1961
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=426
|length_mi=0.52
|terminus_a=Iowa 92 near Rose Hill
|terminus_b=Rose Hill
|established=1960
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=428
|dab=1965–1980
|length_mi=1.21
|terminus_a=Anamosa
|terminus_b=US 151 / Iowa 64 at Anamosa
|established=1965
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=924
|dab=1980–1982
|length_mi=4.00
|terminus_a=Webster–Greene County Line
|terminus_b=Iowa 175 near Farnhamville
|established=1980
|decommissioned=1982
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=933
|dab=1976–1984
|length_mi=0.74
|terminus_b=Iowa 141 in Perry
|established=1976
|decommissioned=1984
|notes=Former section of Iowa 141
}}
{{routelist row
|state=IA
|type=IA 1961
|route=934
|dab=1976–1980
|length_mi=1.07
|terminus_a=US 61 near Burlington
|terminus_b=US 61 near Burlington
|established=1976
|decommissioned=1980
|notes=Former section of US 61; now Memorial Park Road
}}
{{routelist row
|state=IA
|type=IA 1961
|route=935
|dab=1976–1981
|length_mi=0.77
|terminus_a=
|terminus_b=
|established=1976
|decommissioned=1981
|notes=Former section of US 34 parallel to Business US 34 in Burlington
}}
{{routelist row
|state=IA
|type=IA 1961
|route=938
|dab=1976–1980
|length_mi=1.57
|terminus_a=Iowa 947 near Manchester
|terminus_b=Manchester Fish Hatchery
|established=1976
|decommissioned=1980
|notes=Former Iowa 116
}}
{{routelist row
|state=IA
|type=IA 1961
|route=939
|dab=1972–1980
|length_mi=6.76
|terminus_a=US 65
|terminus_b=Iowa 2 near Corydon
|established=1976
|decommissioned=1980
|notes=Former section of Iowa 2
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=940
|dab=1976–1980
|length_mi=2.51
|terminus_a=
|terminus_b=
|established=1976
|decommissioned=1980
|notes=Former sections of Iowa 2
}}
{{routelist row
|state=IA
|type=IA 1961
|route=941
|dab=1976–1980
|length_mi=2.99
|terminus_a=County Road J18 in Moravia
|terminus_b=Iowa 5 near Moravia
|established=1976
|decommissioned=1980
|notes=Former section of Iowa 5
}}
{{routelist row
|state=IA
|type=IA 1961
|route=942
|dab=1976–1980
|length_mi=5.70
|terminus_a=Iowa 5 near Moravia
|terminus_b=County Road J18 in Moravia
|established=1976
|decommissioned=1980
|notes=Former sections of Iowa 5
}}
{{routelist row
|state=IA
|type=IA 1961
|route=943
|dab=1974–1980
|length_mi=0.69
|terminus_a=
|terminus_b=
|established=1974
|decommissioned=1980
|notes=Former section of Iowa 13 in Central City
}}
{{routelist row
|state=IA
|type=IA 1961
|route=944
|dab=1971–1980
|length_mi=0.99
|terminus_a=Iowa 13 in Manchester
|terminus_b=Iowa 13 in Manchester
|established=1976
|decommissioned=1980
|notes=Former section of Iowa 13
}}
{{routelist row
|state=IA
|type=IA 1961
|route=946
|dab=1976–1980
|length_mi=2.72
|terminus_a=Luana city limits
|terminus_b=US 18 / US 52 in Monona
|established=1976
|decommissioned=1980
|notes=Former section of US 18 / US 52 concurrency; two sections
}}
{{routelist row
|state=IA
|type=IA 1961
|route=947
|dab=1976–1981
|length_mi=23.75
|terminus_a=Iowa 187
|terminus_b=Dyersville city limits
|established=1976
|decommissioned=1981
|notes=Former section of US 20
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=951
|dab=1976–1980
|length_mi=2.65
|terminus_a=US 34 west of Osceola
|terminus_b=US 34 near Osceola
|established=1976
|decommissioned=1980
|notes=Former section of US 34
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=952
|dab=1978–1982
|length_mi=0.18
|terminus_a=
|terminus_b=
|established=1978
|decommissioned=1982
|notes=Former section of US 67 north of Clinton
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=953
|dab=1980
|length_mi=0.89
|terminus_a=Iowa 38 near Muscatine
|terminus_b=Iowa 38 in Muscatine
|established=1976
|decommissioned=1980
|notes=Former section of Iowa 38
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=959
|dab=1970–1981
|length_mi=1.27
|terminus_a=US 65 / US 69 in Des Moines
|terminus_b=Des Moines city limits
|established=1970
|decommissioned=1981
|notes=Former section of US 65 / US 69 concurrency
}}
{{routelist row
|state=IA
|type=IA 1961
|route=960
|dab=1973–1982
|length_mi=1.58
|terminus_a=Clarinda city limits
|terminus_b=Iowa 2 near Clarinda
|established=1973
|decommissioned=1982
|notes=Former section of Iowa 2
}}
{{routelist row
|state=IA
|type=IA 1961
|route=961
|dab=1976–1980
|length_mi=0.56
|terminus_a=Villisca city limits
|terminus_b=US 71 near Villisca
|established=1976
|decommissioned=1980
|notes=Former section of US 71
}}
{{routelist row
|state=IA
|type=IA 1961
|route=965
|dab=1976–1980
|length_mi=3.29
|terminus_a=
|terminus_b=
|established=1976
|decommissioned=1980
|notes=Former section of US 52
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=969
|dab=1976–1980
|length_mi=0.52
|terminus_a=US 169 near Burt
|terminus_b=Burt
|established=1976
|decommissioned=1980
|notes=former Iowa 422
}}
{{routelist row
|state=IA
|type=IA 1961
|route=971
|dab=1975–1979
|length_mi=10.78
|terminus_a=Iowa 2
|terminus_b=US 59 in Shenandoah
|established=1975
|decommissioned=1979
|notes=Former section of Iowa 2
}}
{{routelist row
|state=IA
|type=IA 1961
|route=972
|dab=1974–1980
|length_mi=10.17
|terminus_a=Iowa 92 / US 169 in Winterset
|terminus_b=US 169
|established=1974
|decommissioned=1980
|notes=Former section of US 169
}}
{{routelist row
|state=IA
|type=IA 1961
|route=973
|dab=1976–1980
|length_mi=1.49
|terminus_a=Iowa 92 in Winterset
|terminus_b=Iowa 972 in Winterset
|established=1976
|decommissioned=1980
|notes=Former section of Iowa 92
}}
{{routelist row
|state=IA
|type=IA 1961
|route=976
|dab=1974–1980
|length_mi=2.00
|terminus_a=US 218
|terminus_b=Mount Pleasant city limits
|established=1974
|decommissioned=1980
|notes=Former section of US 218; formerly Iowa 972
}}
{{routelist row
|state=IA
|type=IA 1961
|route=980
|length_mi=0.77
|terminus_a=US 34 near Ottumwa
|terminus_b=Ottumwa city limits
|established=1967
|decommissioned=1980
|notes=Former section of US 34; formerly US 34 Alternate
}}
{{routelist row
|state=IA
|type=IA 1961
|route=981
|dab=1967–1980
|length_mi=0.44
|terminus_a=Iowa 150 near Fayette
|terminus_b=Fayette city limits
|established=1967
|decommissioned=1980
|notes=Former section of Iowa 150; formerly Iowa 991
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=983
|dab=1967–1980
|length_mi=0.81
|terminus_a=US 34 west of Chariton
|terminus_b=US 34 east of Chariton
|established=1967
|decommissioned=1980
|notes=Former section of US 34; formerly Iowa 995 and Iowa 996
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=984
|length_mi=2.24
|terminus_a=Bettendorf city limits
|terminus_b=US 67 in Le Claire
|established=1968
|decommissioned=1982
|notes=Former section of Iowa 417
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=999
|length_mi=2.22
|terminus_a=Spruce Street in College Springs
|terminus_b=Iowa 333 near College Springs
|established=1961
|decommissioned=1980
|notes=Former section of Iowa 333
}}
{{routelist bottom|keys=former}}
Routes added
{{Routelist top|length_ref={{IowaDOT|year=1980|2020-08-19}}}}
{{Routelist row
|state=IA
|type=IA 1980
|route=79
|length_mi=5.64
|terminus_a=Geode State Park
|terminus_b=US 34 in Middletown
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=91
|length_mi=4.64
|terminus_a=Iowa 9 in Lyon County
|terminus_b=MN 91 at the Minnesota state line
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=100
|length_mi=2.74
|terminus_a=I-380 in Cedar Rapids
|terminus_b=US 151 in Cedar Rapids
|established=1984
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=102
|length_mi=15.96
|terminus_b=US 63 / Iowa 146 in New Sharon
|established=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=115
|length_mi=1.24
|terminus_a=US 34 near Stanton
|terminus_b=Viking Lake State Park
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=134
|length_mi=1.75
|terminus_a=Beed's Lake State Park
|terminus_b=Iowa 3 near Hampton
|established=1980
|decommissioned=1987
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=142
|length_mi=20.96
|terminus_b=Iowa 5 near Moravia
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=152
|length_mi=1.34
|terminus_b=US 69 at Osceola
|established=1980
|decommissioned=2014
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=186
|length_mi=3.38
|terminus_a=Green Valley State Park
|terminus_b=Iowa 25 in Creston
|established=1980
|decommissioned=2001
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=192
|length_mi=4.74
|terminus_a=I-29 / I-80 at Council Bluffs
|terminus_b=I-29 at Council Bluffs
|established=1931
|decommissioned=2017
|notes=Was decommissioned in 1975, but restored in 1980
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=243
|length_mi=0.56
|terminus_a=Black Hawk Lake State Park
|terminus_b=US 71 / Iowa 175 near Wall Lake
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=244
|length_mi=0.68
|terminus_b=Iowa 191 in Neola
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=362
|length_mi=5.09
|terminus_a=Wilson State Park
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=394
|length_mi=10.67
|terminus_a=Route B at St. Francisville, Mo.
|terminus_b=US 218 near Donnellson
|established=1980
|decommissioned=2005
|notes=Replaced by Iowa 27
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=403
|length_mi=0.47
|terminus_b=Iowa 12 in Akron
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=428
|length_mi=5.75
|terminus_a=Maquoketa Caves State Park
|terminus_b=US 61 near Maquoketa
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=918
|length_mi=1.12
|terminus_a=Iowa 16 near Eldon
|terminus_b=Iowa 16 in Eldon
|established=1984
|decommissioned=2003
|notes=Former section of Iowa 16
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=919
|length_mi=0.29
|terminus_a=Iowa 363 in Urbana
|terminus_b=Walnut Street in Urbana
|established=1984
|decommissioned=1995
|notes=Former section of Iowa 363
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=920
|length_mi=12.61
|terminus_a=Center Point
|terminus_b=Iowa 150 near Urbana
|established=1984
|decommissioned=2003
|notes=Former section of Iowa 150
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=921
|dab=1984–1985
|length_mi=12.47
|terminus_a=Iowa 920 in Center Point
|terminus_b=Hiawatha
|established=1984
|decommissioned=1985
|notes=Former section of Iowa 150
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=922
|dab=1984–1986
|length_mi=1.27
|terminus_a=US 61 in Muscatine
|terminus_b=Iowa 22 in Muscatine
|established=1984
|decommissioned=1986
|notes=Former section of US 61; became part of an extended Iowa 38
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=923
|length_mi=4.52
|length_ref={{IowaDOT|year=1982|2020-08-19}}
|terminus_a=
|terminus_b=
|established=1982
|decommissioned=2003
|notes=Former section of US 218; had three sections
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=925
|length_mi=24.32
|terminus_a=I-80 / US 6 in Adair
|established=1980
|decommissioned=2003
|notes=Former section of US 6
}}
{{routelist row
|state=IA
|type=IA 1980
|route=926
|dab=1980–1988
|length_mi=6.63
|terminus_b=US 6 / Iowa 14 in Newton
|established=1980
|decommissioned=1988
|notes=Former section of US 6
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=927
|length_mi=19.02
|terminus_a=US 6 / Iowa 38 in Wilton
|terminus_b=I-280 / US 6 near Davenport
|established=1980
|decommissioned=2003
|notes=Former section of US 6
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=928
|length_mi=17.15
|terminus_a=Iowa 17 near Webster City
|terminus_b=CR D20 near Williams
|established=1980
|decommissioned=2003
|notes=Former section of US 20
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=929
|length_mi=0.79
|terminus_a=Murray city limits
|terminus_b=Maple Street in Murray
|established=1980
|decommissioned=2003
|notes=Former section of Iowa 152
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=931
|length_mi=8.47
|terminus_b=US 65 in Polk County
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=935
|length_mi=1.38
|terminus_a=I-29
|terminus_b=Mills–Pottawattamie county line
|established=1982
|decommissioned=2003
|notes=Former section of Iowa 370
}}
{{routelist row
|state=IA
|type=IA 1980
|route=938
|length_mi=0.46
|terminus_a=Unionville
|terminus_b=Unionville city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa 369
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=939
|length_mi=12.37
|terminus_a=Independence
|terminus_b=Iowa 187 near Masonville
|established=1980
|decommissioned=2003
|notes=Former section of US 20
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=942
|length_mi=0.47
|terminus_a=Woodburn
|terminus_b=Woodburn city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa 104
}}
{{routelist row
|state=IA
|type=IA 1980
|route=943
|dab=1980–1987
|length_mi=0.43
|terminus_a=Galva
|terminus_b=Galva city limits
|established=1980
|decommissioned=1987
|notes=Former section of Iowa 328
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=944
|length_mi=0.56
|terminus_a=US 61 / Iowa 2 in Fort Madison
|terminus_b=Fort Madison city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa 88
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=945
|length_mi=4.61
|terminus_b=Iowa 931 in Polk County
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=950
|length_mi=3.35
|terminus_a=US 6 / US 65 in Altoona
|terminus_b=Iowa 163 in Pleasant Hill
|established=1980
|decommissioned=1994
|notes=Now 34th Avenue/56th Street
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=951
|length_mi=3.15
|length_ref={{IowaDOT|year=1984|2020-08-19}}
|terminus_a=Carbon city limits
|terminus_b=Iowa 148
|established=1983
|decommissioned=1993
|notes=Former section of Iowa 95
}}
{{routelist row
|state=IA
|type=IA 1980
|route=960
|dab=1982–1986
|length_mi=1.11
|terminus_a=
|terminus_b=
|established=1982
|decommissioned=1986
|notes=Former section of US 61
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=985
|length_mi=1.95
|terminus_a=US 52 near Bellevue State Park
|terminus_b=US 52 near Bellevue
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist bottom|keys=former}}
Existing route changes
{|class="wikitable sortable plainrowheaders"
!scope="col" rowspan=2 | Number
!colspan=2 class=unsortable|Change in length
!scope="col" class="unsortable" rowspan=2 | Southern or western terminus
!scope="col" class="unsortable" rowspan=2 | Northern or eastern terminus
!scope="col" data-sort-type="date" rowspan=2 | Formed
!scope="col" data-sort-type="date" rowspan=2 | Removed
!scope="col" class="unsortable" rowspan=2 | Notes
|-
!scope="col" data-sort-type="number" | mi{{efn|Calculated by subtracting the 1978 mileage from the 1980 mileage}}
!scope="col" data-sort-type="number" | km
|-
{{routelist row
|state=IA
|type=IA 1980
|route=21
|length_mi=12.42
|terminus_a=Iowa 149 near Hedrick
|terminus_b=Iowa 92 near Delta
|established=1934
|notes=Extended south from Iowa 92
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=25
|length_mi=-6.99
|terminus_a=Blockton
|terminus_b=Iowa 2 near Benton
|established=1926
|notes=Continued south to Blockton
}}
{{routelist row
|state=IA
|type=IA 1980
|route=28
|length_mi=6.18
|terminus_a=Iowa 5 in Des Moines
|terminus_b=US 6 in Des Moines
|established=1926
|notes=Extended north from Iowa 5
}}
{{routelist row
|state=IA
|type=IA 1980
|route=72
|length_mi=3.16
|terminus_a=Dows
|terminus_b=I-35 east of Dows
|established=1920
|decommissioned=1986
|notes=Extended east from Dows
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=139
|length_mi=-12.25
|terminus_a=Protivin
|established=1930
|notes=Spur route to Protivin removed
}}
{{routelist row
|state=IA
|type=IA 1980
|route=140
|length_mi=15.55
|terminus_a=Kingsley
|established=1926
|notes=Extended north from Kingsley
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=145
|length_mi=3.13
|terminus_b=Thurman
|established=1931
|decommissioned=2003
|notes=Extended west from Thurman
}}
{{routelist row
|state=IA
|type=IA 1980
|route=150
|length_mi=-11.05
|length_ref={{efn|Calculated by subtracting the 1980 mileage from the 1984 mileage}}
|terminus_a=US 151 in Cedar Rapids
US 218 at Vinton
|terminus_b=Iowa 101 in Benton County
Iowa 920 in Benton County
|established=1941
|notes=Rerouted over Iowa 101 in 1984
}}
{{routelist row
|state=IA
|type=IA 1980
|route=160
|length_mi=1.24
|terminus_b=I-35 at Ankeny
|established=1947
|notes=Extended east within Ankeny
}}
{{routelist row
|state=IA
|type=IA 1980
|route=173
|length_mi=11.53
|terminus_a=Iowa 83 near Atlantic
|terminus_b=Elk Horn
|established=1930
|notes=Extended south from Elk Horn
}}
{{routelist row
|state=IA
|type=IA 1980
|route=210
|length_mi=19.58
|terminus_a=Iowa 141 near Woodward
|terminus_b=Slater
|established=1931
|notes=Rerouted over Iowa 89
}}
{{routelist row
|state=IA
|type=IA 1980
|route=212
|length_mi=-10.02
|terminus_a=Iowa 21 near Belle Plaine
|terminus_b=US 30 near Chelsea
|established=1934
|notes=Continued northwest to US 30 until 1980
}}
{{routelist row
|state=IA
|type=IA 1980
|route=220
|length_mi=-2.20
|length_ref={{efn|Calculated by subtracting the 1980 mileage from the 1982 mileage}}
|terminus_a=Upper South Amana
Iowa 149 at Amana
|terminus_b=US 6 / Iowa 149 at South Amana
East Amana
|established=1931
|notes=Continued east to East Amana and south to Upper South Amana until 1980
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=223
|length_mi=6.94
|terminus_a=Iowa 330 near Baxter
|terminus_b=Baxter
|established=1931
|decommissioned=1997
|notes=Extended west from Baxter
}}
{{routelist row
|state=IA
|type=IA 1980
|route=224
|length_mi=9.37
|terminus_a=Kellogg
|terminus_b=Iowa 14 near Laurel
|established=1931
|notes=Extended north from Kellogg in 1980
}}
{{routelist row
|state=IA
|type=IA 1980
|route=281
|length_mi=17.29
|terminus_a=Dunkerton
|terminus_b=Iowa 150 at Oelwein
|established=1935
|notes=Rerouted over Iowa 190
}}
{{routelist row
|state=IA
|type=IA 1980
|route=333
|length_mi=-3.77
|terminus_a=Fremont–Page county line near Northboro
I-29 at Hamburg
|terminus_b=US 71 near Braddyville
US 59 near Northboro
|established=1935
|notes=Route swap
}}
{{routelist bottom|keys=former}}
Notes
{{notelist}}
References
{{reflist}}