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Placer County, California

Placer County, California
County
County of Placer
Auburn California courthouse.jpg Colfax, CA.JPG
May Snow in Squaw - Flickr - Joe Parks.jpg
Images, from top down, left to right: The Auburn Courthouse, a view of Colfax, May snow in Squaw Valley
Flag of Placer County, California
Flag
Official seal of Placer County, California
Seal
Location in the state of California
Location in the state of California
The location of California in the United States
The location of California in the United States
Coordinates: 39°04′N 120°44′W / 39.06°N 120.73°W / 39.06; -120.73Coordinates: 39°04′N 120°44′W / 39.06°N 120.73°W / 39.06; -120.73
Country  United States
State  California
Regions Sacramento Valley, Sierra Nevada
CSA Greater Sacramento
Incorporated April 25, 1851
Named for Placer mining
County seat Auburn
Largest city Roseville (population and area)
Area
 • Total 1,502 sq mi (3,890 km2)
 • Land 1,407 sq mi (3,640 km2)
 • Water 95 sq mi (250 km2)
Highest elevation 9,044 ft (2,757 m)
Population (April 1, 2010)
 • Total 348,432
 • Estimate (2015) 375,391
 • Density 230/sq mi (90/km2)
Time zone Pacific Time Zone (UTC-8)
 • Summer (DST) Pacific Daylight Time (UTC-7)
Area codes 530, 916
FIPS code 06-061
GNIS feature ID 277295
Website www.placer.ca.gov

Placer County (/ˈplæsər/ PLAS-ər), officially the County of Placer, is a county located in the U.S. state of California. As of the 2010 census, the population was 348,432. The county seat is Auburn.

Placer County is included in the Sacramento-Roseville-Arden-Arcade, CA Metropolitan Statistical Area. It is located in both the Sacramento Valley and Sierra Nevada regions, in what is known as the Gold Country. It stretches from the suburbs of Sacramento to Lake Tahoe and the Nevada border.

The discovery of gold in 1848 brought tens of thousands of miners from around the world, in addition to many more thousands intending to provide goods and services to the miners. Only three years after the discovery of gold, the fast-growing county was formed from portions of Sutter and Yuba counties on April 25, 1851 with Auburn as the county seat. Placer County took its name from the Spanish word for sand or gravel deposits containing gold. Miners washed away the gravel, leaving the heavier gold, in a process known as "placer mining".


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