St. Peter is a city located in Nicollet County, Minnesota, United States. The city is located 10 miles north of the Mankato – North Mankato metropolitan area. The population was 11,196 at the 2010 census. It is the county seat of Nicollet County. Saint Peter is the home of Gustavus Adolphus College. U.S. Highway 169 and Minnesota State Highways 22 and 99 are three of the main routes in the city. St. Peter's sister city is Petatlán, Guerrero, Mexico.
