Muscoy, California, United States [CDP]; population was 7,541 in 1990; housing units was 2,233 in 1990; location is 34°9'N 117°21'W; land area is 2.91 square miles (1,865 acres); water area is 0.06 square miles (41 acres); FIPS code is 50132 [SourceCBP]