Placer County, California

Placer County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF PLACER GUS Population: 433,822 (2024) ID: 123087	County	Official County Government	Contact: CHAIRMAN 175 FULWEILER AVE, AUBURN CA 95603-4543
CITY OF ROSEVILLE GUS Population: 163,304 (2024) ID: 123137	Municipal	Municipal Government Within County	Contact: CITY MANAGER 311 VERNON ST, ROSEVILLE CA 95678-2649
CITY OF ROCKLIN GUS Population: 75,129 (2024) ID: 161231	Municipal	Municipal Government Within County	Contact: CHIEF FINANCIAL OFFICER 3970 ROCKLIN RD, ROCKLIN CA 95677-2720
CITY OF LINCOLN GUS Population: 56,268 (2024) ID: 161230	Municipal	Municipal Government Within County	Contact: DEVELOPMENT SERVICES DIVISION MANAGER 600 6TH ST, LINCOLN CA 95648-1825
CITY OF AUBURN GUS Population: 13,780 (2024) ID: 189640	Municipal	Municipal Government Within County	Contact: CITY CLERK 1225 LINCOLN WAY, ROOM 7, AUBURN CA 95603
TOWN OF LOOMIS GUS Population: 6,939 (2024) ID: 100716	Municipal	Municipal Government Within County	Contact: FINANCE DIRECTOR 3665 TAYLOR RD, LOOMIS CA 95650
CITY OF COLFAX GUS Population: 2,058 (2024) ID: 100715	Municipal	Municipal Government Within County	Contact: CITY MANAGER PO BOX 702, COLFAX CA 95713-0702