1980 United States Senate election in Iowa
{{Short description|none}}
{{Use mdy dates|date=September 2023}}
{{Infobox election
| election_name = 1980 United States Senate election in Iowa
| country = Iowa
| flag_image = Flag of Iowa (xrmap collection).svg
| type = presidential
| ongoing = no
| previous_election = 1974 United States Senate election in Iowa
| previous_year = 1974
| next_election = 1986 United States Senate election in Iowa
| next_year = 1986
| election_date = November 4, 1980
| image_size = 140x140px
| image1 = File:Chuck Grassley 1979 congressional photo.jpg
| nominee1 = Chuck Grassley
| party1 = Republican Party (United States)
| popular_vote1 = 683,014
| percentage1 = 53.49%
| image2 = File:John Culver (cropped).jpg
| nominee2 = John Culver
| party2 = Democratic Party (United States)
| popular_vote2 = 581,545
| percentage2 = 45.54%
| map_image = 1980 United States Senate election in Iowa results map by county.svg
| map_size = 240px
| map_caption = County results
Grassley: {{legend0|#e27f7f|50–60%}} {{legend0|#d75d5d|60–70%}} {{legend0|#d72f30|70–80%}}
Culver: {{legend0|#7996e2|50–60%}} {{legend0|#6674de|60–70%}}
| title = U.S. Senator
| before_election = John Culver
| before_party = Democratic Party (United States)
| after_election = Chuck Grassley
| after_party = Republican Party (United States)
}}
{{ElectionsIA}}
The 1980 United States Senate election in Iowa was held on November 4, 1980. Incumbent Democratic United States Senator John Culver ran for reelection to a second term, but lost to Republican nominee Chuck Grassley, the United States Congressman from Iowa's 3rd congressional district. This election marked the beginning of eight consecutive victories for Grassley in the Senate. It remains the closest election of his Senate career.{{cn|date=December 2023}}
Democratic primary
= Candidates =
- John Culver, incumbent United States Senator
= Results =
{{Election box begin no change
| title = Democratic primary results {{cite web |last1=Synhorst |first1=Melvin |title=SUMMARY OF OFFICIAL CANVASS OF VOTES CAST IN IOWA PRIMARY ELECTION JUNE 3, 1980 |url=http://sos.iowa.gov/elections/pdf/results/80s/1980primcanv.pdf |website=Iowa Secretary of State |publisher=State of Iowa |access-date=20 May 2022}}
}}
{{Election box winning candidate with party link no change
| candidate = John Culver (incumbent)
| party = Democratic Party (United States)
| votes = 95,656
| percentage = 99.95%
}}
{{Election box candidate with party link no change
| candidate = Write-ins
| party = Democratic Party (United States)
| votes = 52
| percentage = 0.05%
}}
{{Election box total no change
| votes = 95,708
| percentage = 100.00%
}}
{{Election box end}}
Republican primary
= Candidates =
- Chuck Grassley, United States Congressman from Iowa's 3rd congressional district
- Tom Stoner
= Results =
{{Election box begin no change
| title = Republican primary results
}}
{{Election box winning candidate with party link no change
| candidate = Chuck Grassley
| party = Republican Party (United States)
| votes = 170,120
| percentage = 65.54%
}}
{{Election box candidate with party link no change
| candidate = Tom Stoner
| party = Republican Party (United States)
| votes = 89,409
| percentage = 34.45%
}}
{{Election box candidate with party link no change
| candidate = Write-ins
| party = Republican Party (United States)
| votes = 34
| percentage = 0.01%
}}
{{Election box total no change
| votes = 259,563
| percentage= 100.00%
}}
{{Election box end}}
General election
= Results =
{{Election box begin | title=United States Senate election in Iowa, 1980{{cite web |title=STATISTICS OF THE PRESIDENTIAL AND CONGRESSIONAL ELECTION OF NOVEMBER 4, 1980 |url=https://clerk.house.gov/member_info/electionInfo/1980election.pdf |website=Office of the Clerk, U.S. House of Representatives |publisher=House of Representatives |access-date=20 May 2022}}
}}
{{Election box winning candidate with party link
| party = Republican Party (United States)
| candidate = Chuck Grassley
| votes = 683,014
| percentage = 53.49%
| change = {{increase}}6.21
}}
{{Election box candidate with party link
| party = Democratic Party (United States)
| candidate = John Culver (incumbent)
| votes = 581,545
| percentage = 45.54%
| change = {{decrease}}6.50
}}
{{Election box candidate with party link
| party = Independent (politician)
| candidate = Garry De Young
| votes = 5,858
| percentage = 0.46%
| change= N/A
}}
{{Election box candidate with party link
| party = Libertarian Party (United States)
| candidate = Robert V. Hengerer
| votes = 4,233
| percentage = 0.33%
| change= N/A
}}
{{Election box candidate with party link
| party = Independent (politician)
| candidate = John Ingram Henderson
| votes = 2,336
| percentage = 0.18%
| change= N/A
}}
{{Election box majority
| votes = 101,469
| percentage = 7.95%
| change = +3.19%
}}
{{Election box turnout
| votes = 1,772,983
| percentage =
| change =
}}
{{Election box gain with party link
| winner = Republican Party (United States)
| loser = Democratic Party (United States)
| swing =
}}
{{Election box end}}