:Placer County, California

The discovery of gold in 1848 brought tens of thousands of miners from around the world during the California gold rush. In addition, many more thousands came to provide goods and services to the miners. On April 25, 1851, the fast-growing county was formed from parts of Sutter and Yuba Counties with Auburn as the county seat. Placer County took its name from the Spanish word for sand or gravel deposits containing gold.{{Cite web |last=AbbiAgency |date=2024-02-13 |title=A History-Lover's Guide to Placer County |url=https://www.visitplacer.com/blog/a-history-lovers-guide-to-placer-county/ |access-date=2024-05-13 |website=Visit Placer |language=en-US}} Miners washed away the gravel, leaving the heavier gold, in a process known as "placer mining".

Gold mining was a major industry through the 1880s, but gradually the new residents turned to farming the fertile foothill soil, harvesting timber and working for the Southern Pacific Railroad. Auburn was settled when Claude Chana discovered gold in Auburn Ravine in May 1848, and it later became a shipping and supply center for the surrounding gold camps. The cornerstone of Placer's courthouse, which is clearly visible from Interstate 80 through Auburn, was laid on July 4, 1894. The building was renovated during the late 1980s and continues to serve the public with courtrooms, a sheriff's office and the Placer County Museum. Roseville, once a small agricultural center, became a major railroad center and grew to the county's most populous city after Southern Pacific Railroad moved its railroad switching yards there in 1908.

Loomis and Newcastle began as mining towns, but soon became centers of a booming fruit-growing industry, supporting many local packing houses. Penryn was founded by a Welsh miner, Griffith Griffith, who established a large granite quarry. Rocklin began as a railroad town and became home to a number of granite quarries. Lincoln and Sheridan continue to support ranching and farming. Lincoln also is the home of one of the county's oldest businesses, the Gladding, McBean terra cotta clay manufacturing plant, established in 1875.

The 1960 Winter Olympics were hosted in Squaw Valley, in Placer County.

According to the U.S. Census Bureau, the county has an area of {{convert|1502|sqmi}}, of which {{convert|1407|sqmi}} is land and {{convert|95|sqmi}} (6.4%) is water.{{Cite web |date=August 22, 2012 |title=2010 Census Gazetteer Files |url=http://www2.census.gov/geo/docs/maps-data/data/gazetteer/counties_list_06.txt |access-date=October 3, 2015 |publisher=United States Census Bureau}} Watercourses in Placer County include the American River and Bunch Creek. 40.96% of Lake Tahoe's surface area is in Placer County, more than in any of the four other counties in which it lies.{{Cite web |publisher=United States Census Bureau |title=U.S. Census website |url=https://www.census.gov |access-date=August 29, 2018 |website=United States Census Bureau}}

The county is typically divided into three regions; "South Placer" in the Central Valley and the Sierra Nevada foothills south of Auburn, "Gold Country" which consists of the Sierra Foothills around Auburn, Colfax, and Foresthill, and the Sierra Nevada which consists of all areas east of Foresthill and northeast of Colfax (including the Lake Tahoe region). Roughly 3/4ths of the population lives in South Placer, Roseville being the primary job and retail center of the county. Auburn and Lincoln are the main secondary commercial centers.

• Nevada County - north
• Washoe County, Nevada - northeast
• Carson City, Nevada - east
• Douglas County, Nevada - southeast
• El Dorado County - south
• Sacramento County - southwest
• Sutter County - west
• Yuba County - northwest

• Eldorado National Forest in part
• Tahoe National Forest in part

{{US Census population

|1860= 13270

|1870= 11357

|1880= 14232

|1890= 15101

|1900= 15786

|1910= 18237

|1920= 18584

|1930= 24468

|1940= 28108

|1950= 41649

|1960= 56998

|1970= 77306

|1980= 117247

|1990= 172796

|2000= 248399

|2010= 348432

|2020= 404739

|estyear=2024

|estimate=433822

|estref={{Cite web |title=Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2024 |url=https://www.census.gov/programs-surveys/popest/data/tables.html |access-date=May 10, 2025 |publisher=United States Census Bureau}}

|align-fn=center

|footnote=U.S. Decennial Census{{Cite web |title=Census of Population and Housing from 1790-2000 |url=https://www.census.gov/prod/www/decennial.html |access-date=January 24, 2022 |publisher=US Census Bureau}}
1790–1960{{Cite web |title=Historical Census Browser |url=http://mapserver.lib.virginia.edu |access-date=October 3, 2015 |publisher=University of Virginia Library}} 1900–1990{{Cite web |date=March 27, 1995 |editor-last=Forstall |editor-first=Richard L. |title=Population of Counties by Decennial Census: 1900 to 1990 |url=https://www.census.gov/population/cencounts/ca190090.txt |access-date=October 3, 2015 |publisher=United States Census Bureau}}
1990–2000{{Cite web |date=April 2, 2001 |title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000 |url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |access-date=October 3, 2015 |publisher=United States Census Bureau}} 2010 2020

}}

The 2010 United States census reported that Placer County had a population of 348,432. The racial makeup of Placer County was 290,977 (83.5%) White, 4,751 (1.4%) African American, 3,011 (0.9%) Native American, 20,435 (5.9%) Asian, 778 (0.2%) Pacific Islander, 13,375 (3.8%) from other races, and 15,105 (4.3%) from two or more races. There were 4,710 Hispanics or Latinos of any race (12.8%).{{USCensus2010CA}}

As of the census{{Cite web |title=U.S. Census website |url=https://www.census.gov |access-date=May 14, 2011 |publisher=United States Census Bureau}} of 2000, there were 248,399 people, 93,382 households, and 67,701 families residing in the county. The population density was {{convert|177|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 107,302 housing units at an average density of {{convert|76|/mi2|/km2}}. The racial makeup of the county was 88.6% White, 0.8% Black or African American, 0.9% Native American, 3.0% Asian, 0.2% Pacific Islander, 3.4% from other races, and 3.2% from two or more races. 9.7% of the population were Hispanic or Latino of any race. 15.5% were of German, 12.3% English, 10.6% Irish, 7.1% Italian and 7.0% American ancestry according to Census 2000. 89.7% spoke only English at home; 6.0% spoke Spanish.

There were 93,382 households, out of which 35.3% had children under the age of 18 living with them, 59.4% were married couples living together, 9.2% had a female householder with no husband present, and 27.5% were non-families. 21.3% of all households were made up of individuals, and 8.1% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 3.06.

In the county, the population was spread out, with 26.5% under the age of 18, 6.9% from 18 to 24, 29.00% from 25 to 44, 24.5% from 45 to 64, and 13.1% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 96.4 males. For every 100 females age 18 and over, there were 93.9 males.

The median income for a household in the county was $57,535, and the median income for a family was $65,858 (these figures had risen to $68,463 and $80,987 respectively as of a 2007 estimate{{Cite web |title=Placer County, California - Fact Sheet - American FactFinder |url=http://factfinder.census.gov/servlet/ACSSAFFFacts?_event=Search&geo_id=05000US06059&_geoContext=01000US%7C04000US06%7C05000US06059&_street=&_county=placer&_cityTown=placer&_state=04000US06&_zip=&_lang=en&_sse=on&ActiveGeoDiv=geoSelect&_useEV=&pctxt=fph&pgsl=050&_submenuId=factsheet_1&ds_name=ACS_2007_3YR_SAFF&_ci_nbr=null&qr_name=null®=null%3Anull&_keyword=&_industry= |url-status=dead |archive-url=https://archive.today/20200211180655/http://factfinder.census.gov/servlet/ACSSAFFFacts?_event=Search&geo_id=05000US06059&_geoContext=01000US%7C04000US06%7C05000US06059&_street=&_county=placer&_cityTown=placer&_state=04000US06&_zip=&_lang=en&_sse=on&ActiveGeoDiv=geoSelect&_useEV=&pctxt=fph&pgsl=050&_submenuId=factsheet_1&ds_name=ACS_2007_3YR_SAFF&_ci_nbr=null&qr_name=null®=null:null&_keyword=&_industry= |archive-date=February 11, 2020 |access-date=July 22, 2010 |publisher=Factfinder.census.gov}}). Males had a median income of $50,410 versus $33,763 for females. The per capita income for the county was $27,963. About 3.9% of families and 5.8% of the population were below the poverty line, including 6.3% of those under age 18 and 3.8% of those age 65 or over. Unemployment in the county is just under 7% which is considerably lower than the state's average.

County government is by a five-person four-year term elected board of supervisors from five single member districts with a board-appointed county manager and his/her department administrators.

The Placer County Sheriff's Office provides court protection, jail administration, and coroner services for all of Placer County. It provides patrol, detective, and other police services for the unincorporated areas of the county plus by contract to the city of Colfax and the town of Loomis.

In its early history Placer County was solidly Republican: it voted Republican in every election between 1860 and 1912, when Bull Moose nominee Theodore Roosevelt was California's official Republican nominee.Menendez, Albert J.; The Geography of Presidential Elections in the United States, 1868-2004, pp. 153–156 {{ISBN|0786422173}} Between 1916 and 1976, however, the county voted Republican only in three landslide elections of 1920, 1952 and 1972 – in all of which its GOP margins were much smaller than for the state or nation. Since the "Reagan Revolution" Placer County has become and remained a stronghold of the Republican Party; it consistently elects Republican public officials and has voted for presidential candidates from the party in every election since 1980.

{{PresHead|place=Placer County, California|source={{Cite web |last=Leip |first=David |title=Dave Leip's Atlas of U.S. Presidential Elections |url=http://uselectionatlas.org/RESULTS/ |website=uselectionatlas.org}}}}

{{PresRow|2024|Republican|123,941|103,958|7,034|California}}

{{PresRow|2020|Republican|122,488|106,869|5,727|California}}

{{PresRow|2016|Republican|95,138|73,509|17,377|California}}

{{PresRow|2012|Republican|99,921|66,818|4,972|California}}

{{PresRow|2008|Republican|94,647|75,112|4,053|California}}

{{PresRow|2004|Republican|95,969|55,573|1,736|California}}

{{PresRow|2000|Republican|69,835|42,449|5,515|California}}

{{PresRow|1996|Republican|49,808|34,981|9,638|California}}

{{PresRow|1992|Republican|38,298|30,783|22,285|California}}

{{PresRow|1988|Republican|42,096|27,516|1,030|California}}

{{PresRow|1984|Republican|38,035|21,294|1,098|California}}

{{PresRow|1980|Republican|28,179|17,311|5,950|California}}

{{PresRow|1976|Democratic|18,154|21,026|1,131|California}}

{{PresRow|1972|Republican|18,597|16,911|1,437|California}}

{{PresRow|1968|Democratic|12,427|14,050|2,667|California}}

{{PresRow|1964|Democratic|9,389|18,256|31|California}}

{{PresRow|1960|Democratic|10,439|13,304|120|California}}

{{PresRow|1956|Democratic|9,059|10,611|69|California}}

{{PresRow|1952|Republican|9,841|9,444|168|California}}

{{PresRow|1948|Democratic|5,570|8,837|702|California}}

{{PresRow|1944|Democratic|4,196|7,149|64|California}}

{{PresRow|1940|Democratic|3,887|8,402|147|California}}

{{PresRow|1936|Democratic|2,321|7,959|108|California}}

{{PresRow|1932|Democratic|2,242|6,200|241|California}}

{{PresRow|1928|Democratic|3,669|3,685|96|California}}

{{PresRow|1924|Progressive|2,192|390|3,402|California}}

{{PresRow|1920|Republican|2,894|1,559|416|California}}

{{PresRow|1916|Democratic|1,954|3,375|462|California}}

{{PresRow|1912|Progressive|15|1,823|2,519|California}}

{{PresRow|1908|Republican|1,865|1,491|269|California}}

{{PresRow|1904|Republican|2,050|1,023|201|California}}

{{PresRow|1900|Republican|2,009|1,592|76|California}}

{{PresRow|1896|Republican|1,890|1,721|65|California}}

{{PresRow|1892|Republican|1,743|1,524|271|California}}

{{PresRow|1888|Republican|1,761|1,547|56|California}}

{{PresRow|1884|Republican|1,749|1,483|75|California}}

{{PresFoot|1880|Republican|1,643|1,416|58|California}}

In the United States House of Representatives, Placer County is within California's 3rd congressional district, represented by {{Representative|cacd|3}}.

In the California State Senate, Placer County is split between the 1st, 4th, and 6th districts,{{Cite web |title=2021 Citizens Redistricting Commission Senate Districts |url=https://sdmg.senate.ca.gov/sites/sdmg.senate.ca.gov/files/2021/2021_crc_sd_state_a_final.pdf |publisher=California Citizens Redistricting Commission}} represented by {{Representative|casd|1}}, {{Representative|casd|4}}, and {{Representative|casd|6}}, respectively.

In the California State Assembly, the county is split between the 1st, 3rd, and 5th districts,{{Cite web |title=Final Maps |url=https://wedrawthelines.ca.gov/transition/maps-final-draft-assembly-districts/ |publisher=California Citizens Redistricting Commission}} represented by {{Representative|caad|1}}, {{Representative|caad|3}}, and {{Representative|caad|5}} respectively.

The following table includes the number of incidents reported and the rate per 1,000 persons for each type of offense.

According to the county's 2010 Comprehensive Annual Financial Report,[http://www.placer.ca.gov/Departments/Auditor/~/media/aud/documents/cafr10/CAFR63010.ashx County of Placer CAFR] the top employers in the county are:

[http://www.mpowerplacer.org/ mPOWER Placer] is Placer County's Property Assessed Clean Energy (PACE) program. It provides financing to commercial, industrial, agricultural and multifamily property owners to install energy efficiency, water conservation and renewable energy retrofits. The program, administered by the [http://www.placer.ca.gov/Departments/Tax.aspx Placer County Treasurer-Tax Collector’s Office], was approved by the Board of Supervisors on February 9, 2010, and launched on March 22, 2010, and is open to eligible Placer County property owners.

{{See also|Transportation in the Sacramento metropolitan area}}

• 20px Interstate 80
• 20px State Route 28
• 20px State Route 49
• 20px State Route 65
• 20px State Route 89
• 25px State Route 174
• 25px State Route 193
• 25px State Route 267

• Placer County Transit provides basic bus service primarily along the I-80 corridor between Alta and the Watt Ave. Sacramento Regional Transit light rail station. PCT also runs commuter service to Downtown Sacramento.
• The cities of Auburn, Lincoln, and Roseville have their own local transit service. The city of Roseville also offers a commuter service to Sacramento.
• Gold Country Stage (Nevada County) provides a connection between Auburn and Grass Valley.
• Tahoe Truckee Area Regional Transit, operated by Placer County and the City of Truckee, operates in Truckee (Nevada County), Tahoe City and along the North Shore of Lake Tahoe to Incline Village, Nevada.
• Greyhound and Amtrak provide long-distance intercity service.

There are three general aviation airports in Placer County:

• Lincoln Regional Airport
• Auburn Airport
• Truckee-Tahoe Airport

The closest commercial airport is Sacramento International Airport in Sacramento.

• Auburn (county seat)
• Colfax
• Lincoln
• Rocklin
• Roseville

• Loomis

{{div col|colwidth=15em}}

• Alta
• Carnelian Bay
• Cedar Flat
• Dollar Point
• Dutch Flat
• Foresthill
• Granite Bay
• Kings Beach
• Kingvale
• Meadow Vista
• Newcastle
• North Auburn
• Penryn
• Sheridan
• Sunnyside-Tahoe City
• Tahoe Vista
• Tahoma

{{div col end}}

{{Div col|colwidth=15em}}

• Applegate
• Baxter
• Blue Canyon
• Bowman
• Emigrant Gap
• Northstar
• Ophir
• Olympic Valley
• Weimar

{{Div col end}}

• Iowa Hill

The population ranking of the following table is based on the 2020 census of Placer County.{{Cite web |title=Explore Census Data |url=https://data.census.gov/cedsci/ |access-date=October 8, 2021 |website=United States Census Bureau }}

† county seat

School districts include:

Unified K-12:{{cite web|url=https://www2.census.gov/geo/maps/DC2020/PL20/st06_ca/schooldistrict_maps/c06061_placer/DC20SD_C06061.pdf|title=2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Placer County, CA|publisher=U.S. Census Bureau|access-date=2024-08-28}} - [https://www2.census.gov/geo/maps/DC2020/PL20/st06_ca/schooldistrict_maps/c06061_placer/DC20SD_C06061_SD2MS.txt Text list]

{{div col|colwidth=30em}}

• Center Joint Unified School District
• Rocklin Unified School District
• Tahoe-Truckee Unified School District
• Western Placer Unified School District

{{div col end}}

Secondary school districts:

{{div col|colwidth=30em}}

• East Nicolaus Joint Union High School District
• Placer Union High School District
• Roseville Joint Union High School District

{{div col end}}

Additionally, Twin Rivers Unified School District includes a section of the county for grades 9–12 only.

Elementary school districts:

{{div col|colwidth=30em}}

• Ackerman Elementary School District
• Alta-Dutch Flat Union Elementary School District
• Auburn Union Elementary School District
• Colfax Elementary School District
• Dry Creek Joint Elementary School District
• Elverta Joint Elementary School District
• Eureka Union Elementary School District
• Foresthill Union Elementary School District
• Loomis Union Elementary School District
• Newcastle Elementary School District
• Placer Hills Union Elementary School District
• Pleasant Grove Joint Union Elementary School District
• Roseville City Elementary School District

{{div col end}}

• List of school districts in Placer County, California
• National Register of Historic Places listings in Placer County, California

{{reflist|group=note}}

{{reflist}}

{{commons category}}

• {{official website|http://www.placer.ca.gov/|Official Placer County website}}
• [https://www.visitplacer.com/ Placer County Visitors Bureau]
• [http://www.placer.ca.gov/library Placer County Library]
• [http://www.placernaturecenter.org Placer Nature Center]
• [https://www.placer.ca.gov/museums Placer County Museums]
• [http://www.placersentinel.com/ Placer Sentinel Newspaper]
• [http://latimesblogs.latimes.com/california-politics/2011/01/brown-calls-special-election-for-4th-assembly-district.html Special Election called for 4th Assembly District], November 1, 2011
• [http://www.placer.networkofcare.org/mh Placer County Network of Care]

{{Geographic location

| Centre = Placer County, California

| North = Nevada County

| Northeast =

| East = Washoe County, Nevada and Carson City, Nevada

| Southeast = Douglas County, Nevada

| South = El Dorado County

| Southwest = Sacramento County

| West = Sutter County

| Northwest = Yuba County

}}

{{Cities of Placer County, California}}

{{Greater Sacramento}}

{{Sacramento Valley}}

{{California}}

{{authority control}}

Category:California counties

Category:Counties in the Sacramento metropolitan area

Category:Sacramento Valley

Category:Sierra Nevada (United States)

Category:1851 establishments in California

Category:Populated places established in 1851