In 2021, Contra Costa County, CA had a population of 1.16M people with a median age of 39.9 and a median household income of $110,455. Between 2020 and 2021 the population of Contra Costa County, CA grew from 1.15M to 1.16M, a 1.21% increase and its median household income grew from $103,997 to $110,455, a 6.21% increase.
The 5 largest ethnic groups in Contra Costa County, CA are White (Non-Hispanic) (41.6%), Asian (Non-Hispanic) (17.6%), Other (Hispanic) (11.3%), White (Hispanic) (8.35%), and Black or African American (Non-Hispanic) (8.29%).
None of the households in Contra Costa County, CA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
89.4% of the residents in Contra Costa County, CA are U.S. citizens.
The largest universities in Contra Costa County, CA are Diablo Valley College (3,526 degrees awarded in 2021), Los Medanos College (2,255 degrees), and Contra Costa College (1,662 degrees).
In 2021, the median property value in Contra Costa County, CA was $689,000, and the homeownership rate was 67%.
Most people in Contra Costa County, CA drove alone to work, and the average commute time was 37.8 minutes. The average car ownership in Contra Costa County, CA was 2 cars per household.
Contra Costa County, CA borders Alameda County, CA, Marin County, CA, Sacramento County, CA, San Francisco County, CA, San Joaquin County, CA, Solano County, CA, and Sonoma County, CA.