Butte des Morts is an unincorporated census-designated place in the town of Winneconne, in Winnebago County, Wisconsin, United States. As of the 2010 census, its population was 962. The community is located at the north side of (Big) Lake Butte des Morts on the former route of Wisconsin Highway 110. The name means "hill of the dead" in French. Butte des Morts uses the ZIP code 54927. The Austin Grignon Hotel, listed on the National Register of Historic Places, is located within the community. Butte des Morts has an area of 1.246 square miles (3.23 km²); 1.225 square miles (3.17 km²) of this is land, and 0.021 square miles (0.054 km²) is water.