St. Croix Falls, Wisconsin, United States [City]; population was 1,640 in 1990; housing units was 735 in 1990; location is 45°25'N 92°38'W; land area is 2.90 square miles (1,854 acres); water area is 0.10 square miles (63 acres); FIPS code is 70550 [SourceCBP]