Contra Costa County Demographics

2010 Population:


source: 2010 Decennial Census

2017 Population Estimate: 1,139,513 

Unincorporated County 2017 Population Estimate: 173,454
Source: 2016 California Department of Finance
Department of Finance Population Estimates of Cities, County, and the State

2015 American Community Survey (ACS) Population Characteristics

ACS 5-Year Estimates (2011-2015)
Selected Social Characteristics
Selected Economic Characteristics
Selected Housing Characteristics
Demographics Estimates

Comparative Characteristics 2006-2010 and 2011-2015
Comparative Social Characteristics
Comparative Economic Characteristics
Comparative Housing Characteristics
Comparative Demographic Estimates
Demographics by Community
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