Palos Hills, Illinois, United States [City]; population was 17,803 in 1990; housing units was 6,892 in 1990; location is 41°42'N 87°50'W; land area is 4.17 square miles (2,667 acres); water area is 0.07 square miles (45 acres); FIPS code is 57394 [SourceCBP]