San Dimas, California, United States [City]; population was 32,397 in 1990; housing units was 11,479 in 1990; location is 34°7'N 117°48'W; land area is 15.52 square miles (9,931 acres); water area is 0.12 square miles (80 acres); FIPS code is 66070 [SourceCBP]