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 San Marcos
 San Marcos, California, United States [City]; population was 38,974 in 1990; housing units was 14,476 in 1990; location is 33°8'N 117°10'W; land area is 23.19 square miles (14,842 acres); water area is 0.03 square miles (17 acres); FIPS code is 68196 [SourceCBP]San Marcos, California, United States [Populated Place] is in San Diego County; location is 33°8'36"N 117°9'55"W [SourceGSP]San Marcos, California, United States Postal Service Zip Code is 92069 (Lake San Marcos; Sta #2) [SourcePSZ]San Marcos, Texas, United States [City]; population was 28,743 in 1990; housing units was 10,923 in 1990; location is 29°53'N 97°56'W; land area is 17.43 square miles (11,156 acres); water area is 0.11 square miles (73 acres); FIPS code is 65600 [SourceCBP]San Marcos, Texas, United States [Populated Place] is in Hays County; location is 29°52'59"N 97°56'28"W; elevation is 619 feet [SourceGSP]San Marcos, Texas, United States Postal Service Zip Code is 78666, 78667 (Main Office Boxes) [SourcePSZ]
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