Aliquippa, Pennsylvania, United States [City]; population was 13,374 in 1990; housing units was 6,118 in 1990; location is 40°37'N 80°15'W; land area is 4.09 square miles (2,619 acres); water area is 0.38 square miles (246 acres); FIPS code is 820 [SourceCBP]