Contra Costa County
County in California
Contra Costa County 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. Wikipedia
Population: 1.157 million (2022)
Area: 716 mi²
Non emergency: 925-646-2441
Area code: 510, 341, 925
Congressional districts: 8th, 9th, 10th
County seat: Martinez
View all calendar events · Kensington Municipal Advisory Council (KMAC) regular meeting · Zoning Administrator Meeting · Board of Supervisors Meeting · ** ...
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As of the 2020 United States Census, the population was 1,165,927. The county seat is Martinez. It occupies the northern portion of the East Bay ...
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In 1853, Alameda County was formed from territory originally included in this county. 1025 Escobar Street Martinez, CA 94553. View map. (925) 655-2075.
The Contra Costa County Library is the public library system in Contra Costa County, California, United States. There are 26 community…
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