Palos Heights, Illinois, United States [City]; population was 11,478 in 1990; housing units was 3,980 in 1990; location is 41°40'N 87°48'W; land area is 3.48 square miles (2,225 acres); water area is 0.06 square miles (41 acres); FIPS code is 57381 [SourceCBP]