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  1. Contra Costa County, California - Wikipedia

  2. Contra Costa County, CA Official Website | Official Website

  3. Cities & Communities of Contra Costa | Contra Costa County, CA …

  4. Contra Costa County, CA Official Website | Official Website

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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 county seat is Martinez. It occupies the northern portion of the East Bay region of the San Francisco Bay Area and is primarily suburban. The county's name refers to its position on the other side of the bay from San Francisco. Contra Costa County is included in the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area .
    Contra Costa County is broadly divided into three sub-areas: West County, including of the cities of El Cerrito, Richmond, San Pablo, Pinole, and Hercules, as well as the unincorporated communities of Kensington, El Sobrante, North Richmond, Rodeo, Crockett, and Port Costa.
    East of the Oakland Hills that border the East Bay, Contra Costa County maintains a very separate culture and lifestyle than its Bay Area neighbors. The area is mostly residential—although many San Francisco businesses have moved here to avoid high city taxes—and affluent, and consequently considerably more conservative (by Bay Area standards).
  6. Contra Costa County - California State Association of …

    WebMay 26, 2015 · CONTRA COSTA. County seat, Martinez. Created February 18, 1850. The name signifies “opposite coast,” because of its situation opposite San Francisco, in an easterly direction, on San …

  7. Demographics | Contra Costa County, CA Official Website

  8. Contra Costa County – Travel guide at Wikivoyage

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