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.
The largest universities in Contra Costa County, CA are Diablo Valley College (113634) (3,728 degrees awarded in 2020), Los Medanos College (2,631 degrees), and Contra Costa College (1,779 degrees).
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.
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.