St. Croix Falls, Wisconsin is a city in Polk County, Wisconsin, United States, with a total area of 3.5 square miles along the scenic St. Croix River. The population was 2,033 at the 2010 census. The city is located within the Town of St. Croix Falls. U.S. Route 8, Wisconsin Highway 35, and Wisconsin Highway 87 are three of the main arterial routes in the city.
St. Croix Falls abuts two parks whose focal points are the St. Croix River (Wisconsin-Minnesota). It is home to the Park Headquarters for the St. Croix National Scenic Riverway, and it lies adjacent to the Interstate Park, a state park of Minnesota and Wisconsin that spans the Minnesota-Wisconsin state line along the St. Croix River Dalles with parts of the park on both sides. St. Croix Falls is the western terminus of the Ice Age Trail and the Gandy Dancer Trail. The St. Croix Falls Dam is located in St. Croix Falls.