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Contra Costa

1. Contra Costa, California, United States [County] includes Alamo [Populated], Alamo Oaks, Antioch [Populated], Avon (Associated Post Office), Bancroft, Bayo Vista, Bethel Island [Populated], Bixler, Brentwood, Bridgehead, byron, Christie, Clayton, Clyde, Concord [Populated], Cowell, Crockett, Danville [Populated], Diablo, East Antioch, Eastport, Eckley, El Cerrito, El Sobrante [Populated], Four Corners, Gateley, Giant, Glen Frazer, Glorietta, Hercules [Populated], Herpoco, Hookston, Junction Camp, Kensington [Populated], Knightsen, Lafayette [Populated], Las Juntas, Los Medanos, Luzon, Maltby, Marsh Creek Springs, Martinez, McAvoy, Meinert, Mococo, Monsanto, Moraga, Muir, Newlove, Nichols, Nitro, North Richmond, Nortonville, Oakley [Populated], Oleum, Orinda [Populated], Orinda Village, Orwood, Ozol, Pacheco, Pinole [Populated], Pittsburg [Populated], Pleasant Hill [Populated], Point Richmond, Port Chicago, Port Costa, Rheem, Rheem, Rheem Valley, Richmond [Populated], Rock City, Rodeo [Populated], San Pablo [Populated], San Ramon [Populated], Sand Hill [Populated], Selby, Shore Acres, Sobrante, Somersville, Sparkle, Stege, Stewartville, Tassajara, Tormey, Valle Vista, Valona, Vine Hill, Walnut Creek [Populated], Werner, West Hartley, West Pittsburg [Populated] [SourceGSP]
2. Contra Costa, California, United States [County]; population was 803,732 in 1990; housing units was 316,170 in 1990; location is 37°56'N 121°57'W; land area is 720.29 square miles (460,985 acres); water area is 81.89 square miles (52,410 acres); FIPS code is 13 [SourceCBP]