Lafayette is a city in Nicollet County, Minnesota, United States. The population was 492 at the 2020 census. It is a farming community jus…Lafayette is a city in Nicollet County, Minnesota, United States. The population was 492 at the 2020 census. It is a farming community just outside the larger town of New Ulm. Lafayette is part of the Mankato-North Mankato Metropolitan Statistical Area.