Cahokia, Illinois, United States [Village]; population was 17,550 in 1990; housing units was 6,411 in 1990; location is 38°34'N 90°11'W; land area is 9.65 square miles (6,175 acres); water area is 0.37 square miles (235 acres); FIPS code is 10370 [SourceCBP]