Placer County, California
Placer County: county in California, United States
About
Placer County is a county located in the U.S. state of California. As of the 2010 census, the population was 348,432 and a population density of 90 people per km². After 10 years in 2020 county had an estimated population of 402,950 inhabitants. Its county seat is Auburn. The county was created 175 years ago in 1850.
County Snapshot
Placer County at a glance
Placer County currently has 13 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
13
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
California counties
58
Open related pagesLargest city
RosevillePopulation 144,725
Top linked places
Quick Facts about Placer County
| Population | 402,950 (2020) |
| Country | United States of America |
| State | California (United States) |
| Area | 3892 km2 |
| Water as percent of area | 6.35% |
| Land as percent of area | 93.65% |
| Latitude & Longitude | 39.0634,-120.7177 |
| Named for | placer mining |
| Altitude | 3,593 feet / 1095 meters |
| Capital | Auburn |
| Establishment | January 01, 1851 |
| Time Zone | America/Los_Angeles |
| Local time | 23:45:47 (16th April 2026) |
| Density | 104 Pop. per km² as of 2020 |
| Population growth | 13.53% (2010-2020) |
| Weather | 46℉ Partly Cloudy 7-days weather |
Geography
Placer County is located at 39°3'48"N 120°43'4"W (39.0634300, -120.7176600). It has 8 neighbors: El Dorado County, Nevada County, Sacramento County, Sutter County, Yuba County, Carson City, Douglas County and Washoe County.
Placer County map
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The largest city of Placer County is Roseville with a population of 144,725. Other cities include, Rocklin population 70,159, Lincoln population 48,996, Auburn population 14,205 and Loomis population 6,844. See all Placer County cities & populated places.
Placer County Populated Places
Cities, towns, neighborhoods & other populated places in Placer County.
| City Name | Population | Title |
|---|---|---|
| Roseville | 144,725 | The fifth most populous city in Sacramento County, California. |
| Rocklin | 70,159 | The most populous city in Placer County, California. |
| Lincoln | 48,996 | The most populous city in Placer County, California. |
| Granite Bay | 20,402 | Census-designated place in California, USA |
| Auburn | 14,205 | City in California, United States |
| North Auburn | 13,022 | Census designated place |
| Loomis | 6,844 | City in California |
| Kings Beach | 3,796 | Census-designated place in Placer County, California |
| Meadow Vista | 3,217 | Census-designated place in Placer County, California |
| Colfax | 2,009 | City in California, USA |
| Foresthill | 1,483 | Census-designated place in Placer County, California |
| Tahoe Vista | 1,433 | Census-designated place in Placer County, California |
| Dollar Point | 1,215 | Census-designated place in Placer County, California |
Weather
Partly cloudy, with a low around 46.
7-Day ForecastOfficial website of Placer County
Official Website- Auburn
Demographics
The population of Placer County increased by 13.53% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 348,432 | - | census |
| 2011 | 356,328 | 2.22% | estimation process |
| 2012 | 360,263 | 1.09% | estimation process |
| 2013 | 365,398 | 1.41% | estimation process |
| 2014 | 369,217 | 1.03% | estimation process |
| 2015 | 372,841 | 0.97% | estimation process |
| 2016 | 378,943 | 1.61% | estimation process |
| 2017 | 385,115 | 1.6% | estimation process |
| 2018 | 392,330 | 1.84% | estimation process |
| 2019 | 398,329 | 1.51% | estimation process |
| 2020 | 402,950 | 1.15% | estimation process |
People born in Placer County (3)
People born in Placer County, including football player and coach, lawyer George W. Gregory, artist Frank Happersberger, american writer, wife of John Fante Joyce Fante, .
More notable people
California Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Los Angeles County | 9,943,046 | County in California, United States of America |
| Los Angeles | 3,970,219 | The second most populous city in the United States and the center of the Los Angeles metropolitan area. |
| San Diego County | 3,332,427 | Founded in 1850, is one of 58 counties in the US state of California. |
| Orange County | 3,166,857 | County in California, United States |
| Riverside County | 2,489,188 | County in California, United States |
| San Bernardino County | 2,189,183 | County in California, United States |
| Santa Clara County | 1,907,105 | County in California, United States |
| Alameda County | 1,662,323 | County in California, United States |
| Sacramento County | 1,559,146 | County in California, United States |
| San Diego | 1,422,420 | The eighth most populous city in the United States and the center of the San Diego metropolitan area. |
| Laguna | 1,370,232 | A city located in Orange County, California. |
| Contra Costa County | 1,152,333 | County in California, United States |
| San Jose | 1,013,616 | The tenth most populous city in the United States and the center of the San Jose metropolitan area. |
| Fresno County | 1,000,918 | County in California, United States |
| Kern County | 901,362 | This county is located in the southern San Joaquin Valley, extending eastward over the Tehachapi Mountains to the Mojave Desert. |
| San Francisco County | 866,606 | County, coextensive with the city of San Francisco, California, United States |