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Contra Costa County (/ ˌ k ɒ n t r ə ˈ k ɒ s t ə / ⓘ; Contra Costa, Spanish for 'Opposite Coast') is a county located in the U.S. state of California, in the East Bay of the San Francisco Bay Area. As of the 2020 United States Census, the population was 1,165,927. The county seat is Martinez.
Concord (/ ˈ k ɒ ŋ k ər d / KON-kerd) is the most populous city in Contra Costa County, California, United States. According to an estimate completed by the United States Census Bureau, the city had a population of 129,295 in 2019, making it the eighth largest city in the San Francisco Bay Area.
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Contra Costa County is home to more than one million residents, and was one of the original 27 counties established in California in 1850. Comprised of 19 cities and many established communities in the unincorporated area, it is the ninth most populous county in the state.
The district is located in the East Bay, on the southern shore of the Carquinez Strait, spanning from Rodeo to Piedmont, in Contra Costa County and Alameda County.
Apr 10, 2024 · Discover Contra Costa County, CA’s population & how it has changed over time. USAFacts uses Census data to break down the population of Contra Costa County by race, age,and more. View today.
5 days ago · Posted on May 21, 2024. The Contra Costa County Board of Supervisors adopted the $5.996 billion Fiscal Year 2024-2025 County...
