Alsip, Illinois, United States [Village]; population was 18,227 in 1990; housing units was 7,144 in 1990; location is 41°40'N 87°44'W; land area is 6.31 square miles (4,038 acres); water area is 0.16 square miles (102 acres); FIPS code is 1010 [SourceCBP]