In 2020, Contra Costa County, CA had a population of 1.15M people with a median age of 39.9 and a median household income of $103,997. Between 2019 and 2020 the population of Contra Costa County, CA grew from 1.14M to 1.15M, a 0.485% increase and its median household income grew from $99,716 to $103,997, a 4.29% increase.
The 5 largest ethnic groups in Contra Costa County, CA are White (Non-Hispanic) (42.6%), Asian (Non-Hispanic) (17.2%), Other (Hispanic) (10.5%), White (Hispanic) (10.4%), and Black or African American (Non-Hispanic) (8.23%).
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.
89.2% of the residents in Contra Costa County, CA are U.S. citizens.
In 2020, the median property value in Contra Costa County, CA was $655,500, and the homeownership rate was 66.8%. Most people in Contra Costa County, CA drove alone to work, and the average commute time was 38.5 minutes. The average car ownership in Contra Costa County, CA was 2 cars per household.