Mission Viejo, California, United States [City]; population was 72,820 in 1990; housing units was 26,393 in 1990; location is 33°37'N 117°39'W; land area is 17.45 square miles (11,170 acres); water area is 0.39 square miles (249 acres); FIPS code is 48256 [SourceCBP]