Placentia, California, United States [City]; population was 41,259 in 1990; housing units was 13,733 in 1990; location is 33°53'N 117°51'W; land area is 6.59 square miles (4,219 acres); water area is 0.01 square miles (5 acres); FIPS code is 57526 [SourceCBP]