Contra Costa County Population 2017

Contra Costa County's estimated population is 1,135,127 with a growth rate of 1.06% in the past year according to the most recent United States census data. Contra Costa County is the 9th largest county in California.

Year Population Growth Growth Rate
20161,135,12711,8961.06%
20151,123,23114,2351.28%
20141,108,99614,9661.37%
20131,094,03015,7881.46%
20121,078,24212,1161.14%
20111,066,12613,2511.26%
20101,052,875249,14331.00%
1990803,732147,35222.45%
1980656,38097,99117.55%
1970558,389149,35936.52%
1960409,030110,04636.81%
1950298,984198,534197.64%
1940100,45021,84227.79%
193078,60824,71945.87%
192053,88922,21570.14%
191031,67413,62875.52%
190018,0464,53133.53%
189013,5159907.90%
188012,5254,06448.03%
18708,4613,13358.80%
18605,3280.00%

Contra Costa County Population Growth

Population Data via

Contra Costa County Race Data

Race Population Percentage
White753,15466.35%
Asian187,03916.48%
Black or African American107,5149.47%
Two or More Races57,7485.09%
American Indian and Alaska Native11,3031.00%
Native Hawaiian and Other Pacific Islander6,4730.57%

Contra Costa County Population Pyramid

0k10k20k30k40kContra Costa County Male Population0k10k20k30k40kContra Costa County Female Population

Population of Cities in Contra Costa County

City 2010 Census 2016 Estimated Growth Growth Rate
Concord12215412872665725.38%
Antioch10274511089881537.94%
Richmond10364510981361685.95%
San Ramon714547563941855.86%
Pittsburg6325970679742011.73%
Walnut Creek641656912249577.73%
Brentwood5162460532890817.26%
Danville418494463127826.65%
Oakley3543240622519014.65%
Martinez360363825922236.17%
Pleasant Hill331143485317395.25%
San Pablo291343053614024.81%
Lafayette237942610323099.70%
El Cerrito235862540018147.69%
Hercules240702536012905.36%
Orinda177511947017199.68%
Pinole18330192939635.25%
Moraga160061741614108.81%
Clayton109181199210749.84%
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990