Contra Costa County, California

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The location of Contra Costa County in the state of California.

Contra Costa County is a county in the state of California. It is in the United States. As of the 2010 census, the population was 1,049,025.^[1] The county seat is Martinez.^[2] It is in the northern part of the San Francisco Bay Area region.

References

↑ "State & County QuickFacts". United States Census Bureau. http://quickfacts.census.gov/qfd/states/06/06013.html.
↑ "Find a County". National Association of Counties. http://www.naco.org/Counties/Pages/FindACounty.aspx.

v]] t]] e] San Francisco Bay Area

Bodies of water	Bodega Bay Carquinez Strait Clifton Forebay Golden Gate Grizzly Bay Guadalupe River Half Moon Bay Lake Berryessa Napa River Oakland Estuary Petaluma River Raccoon Strait Richardson Bay Richmond Inner Harbor Russian River Sacramento River San Francisco Bay San Leandro Bay San Pablo Bay Sonoma Creek Suisun Bay Tomales Bay

Counties	Alameda Contra Costa Marin Napa San Francisco San Mateo Santa Clara Solano Sonoma

Major cities	San Jose San Francisco Oakland

Cities and towns 100k–250k	Antioch Berkeley Concord Daly City Fairfield Fremont Hayward Richmond Santa Clara Santa Rosa Sunnyvale Vallejo

Cities and towns 50k–99k	Alameda Brentwood Castro Valley Cupertino Livermore Milpitas Mountain View Napa Novato Palo Alto Petaluma Pittsburg Pleasanton Redwood City San Leandro San Mateo San Rafael San Ramon South San Francisco Union City Vacaville Walnut Creek

Cities and towns 25k-50k	Belmont Benicia Burlingame Campbell Danville Dublin East Palo Alto Foster City Gilroy Los Altos Los Gatos Martinez Menlo Park Morgan Hill Newark Oakley Pacifica Pleasant Hill Rohnert Park San Bruno San Carlos San Pablo Saratoga Suisun City Windsor

Cities and towns 10k–25k	Alamo Albany Alum Rock American Canyon Ashland Bay Point Cherryland Clayton Discovery Bay Dixon El Cerrito El Sobrante Emeryville Fairview Half Moon Bay Healdsburg Hercules Hillsborough Lafayette Larkspur Millbrae Mill Valley Moraga North Fair Oaks Orinda Piedmont Pinole San Anselmo San Lorenzo Sonoma Stanford Tamalpais-Homestead Valley

Sub-regions	East Bay North Bay San Francisco Peninsula Silicon Valley South Bay

Transportation Sports

v]] t]] e] Municipalities and communities of Contra Costa County, California, United States

County seat: Martinez

Cities and towns	Antioch Brentwood Clayton Concord Danville El Cerrito Hercules Lafayette Martinez Moraga Oakley Orinda Pinole Pittsburg Pleasant Hill Richmond San Pablo San Ramon Walnut Creek

CDPs	Acalanes Ridge Alamo Alhambra Valley Bay Point Bayview Bethel Island Blackhawk Byron Camino Tassajara Castle Hill Clyde Contra Costa Centre Crockett Diablo Discovery Bay East Richmond Heights El Sobrante Kensington Knightsen Montalvin Manor Mountain View Norris Canyon North Gate North Richmond Pacheco Port Costa Reliez Valley Rodeo Rollingwood San Miguel Saranap Shell Ridge Tara Hills Vine Hill

Unincorporated communities	Alamo Oaks Arbor Avon Bancroft Bayo Vista Bayview-Montalvin Bixler Blackhawk-Camino Tassajara Bridgehead Canyon Christie Cornwall Crolona Heights Diamond Eastport Four Corners Franklin Canyon Gateley Glen Frazer Hasford Heights Herpoco Hookston Las Juntas Los Medanos Luzon Maltby Marsh Creek Springs McAvoy Meinert Monsanto Muir Neroly Newlove Nichols Oleum Orwood Ozol Rheem Rock City Selby Shore Acres Sobrante Sparkle Stege Tassajara Tormey Valle Vista Valona Waldon Walnut Heights Werner

Ghost towns	Acelanus Ambrose Atchison Eckley Empire Giant (Nitro) Hooper Horse Haven Judsonville Junction Nortonville Ohmer Point of Timber Port Chicago Schmidtville Somersville Stewartville Tammukan West Hartley Winehaven