Contra Costa County Demographics

2010 Population: 1,049,025

source: 2010 Decennial Census

2017 Population Estimate: 1,149,363

Unincorporated County 2018 Population Estimate: 172,513

Source: 2018 California Department of Finance

Department of Finance Population Estimates of Cities, County, and the State

2017 American Community Survey (ACS) Population Characteristics

ACS 5-Year Estimates (2013-2017)

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

ACS Users Guide

Demographics by Community