West Mifflin, Pennsylvania, United States [Borough]; population was 23,644 in 1990; housing units was 9,948 in 1990; location is 40°21'N 79°54'W; land area is 14.16 square miles (9,063 acres); water area is 0.26 square miles (167 acres); FIPS code is 83512 [SourceCBP]
