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.
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.