Clairton, Pennsylvania, United States [City]; population was 9,656 in 1990; housing units was 4,676 in 1990; location is 40°18'N 79°53'W; land area is 2.76 square miles (1,769 acres); water area is 0.24 square miles (157 acres); FIPS code is 13704 [SourceCBP]