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Placer County offices will be closed Nov. 23 and 24 for Thanksgiving. Have a wonderful holiday!

Population Estimates


Placer County's population grew 1.44 percent between July 1, 2015 and July 1, 2016 to total 376,092 persons. This represents an increase of 5,354 residents during the last fiscal year. The increase is slightly above the average of 1.2 percent and continues the moderate growth that Placer County has experienced for the past five years.

Net migration added 70,000 residents and remains the primary source of the county’s growth. Net migration includes all legal and unauthorized foreign immigrants, residents who left the state to live abroad, and the balance of hundreds of thousands of people moving to and from Placer County from within California and the United States. The county gained about 4,265 net domestic migrants and 619 net foreign immigrants last year. The natural increase (births minus deaths) of 470 is comprised of approximately 3,724 births minus 3,254 deaths. The birth rate increased to 9.90 births per 1,000 population. The death rate has slowly increased to 8.65 deaths per 1,000 population.

Since the national census on April 1, 2010, the county has grown by 26,040 persons.

State/City Total Population Percent
1/1/2016 1/1/2017 Change
California 39,189,035 39,523,613 0.9
Placer 376,203 382,837 1.8
Auburn 14,066 14,096 0.2
Colfax 2,054 2,070 0.8
Lincoln 47,268 48,165 1.9
Loomis 6,715 6,775 0.9
Rocklin 61,672 64,417 4.5
Roseville 133,618 135,868 1.7
Balance of County 110,810 111,446 0.6

E-1 Population Estimates for Placer County Cities and the County with Annual Percentage Change

E-2 Placer County Population Estimates and Components of Change by Year

E-3 Race/Ethnic Population Estimates: Components of Change for Placer County

E-4 Historical Population Estimates for Placer County, Cities, and the State

  • 2010-2017
  • 2000-2010
  • 1990-2000
  • 1980-1990
  • 1970-1980

E-5 Population and Housing Estimates for Placer County, Cities, and the State