St. Peter, Wisconsin is an unincorporated census-designated place in the Town of Taycheedah in Fond du Lac County, Wisconsin. It is located approximately 2 miles (3.2 km) northeast of Peebles and 1 mile (1.6 km) south of Silica. It was located on Wisconsin Highway 149 before the highway was decommissioned and turned over to county control as County Highway WH. As of the 2020 census, its population is 1,642, up from 1,489 at the 2010 census.