Round Lake Park, Illinois, United States [Village]; population was 4,045 in 1990; housing units was 1,356 in 1990; location is 42°19'N 88°4'W; land area is 3.27 square miles (2,092 acres); water area is 0.03 square miles (18 acres); FIPS code is 66066 [SourceCBP]
