Lake in the Hills, Illinois, United States [Village]; population was 5,866 in 1990; housing units was 1,938 in 1990; location is 42°12'N 88°19'W; land area is 5.06 square miles (3,237 acres); water area is 0.11 square miles (72 acres); FIPS code is 41183 [SourceCBP]