Mapleton is a city in Cass County, North Dakota, United States. It sits on the banks of the Maple River. The population was 1,320 at the 2020 census. Mapleton serves as a bedroom community of the Fargo-Moorhead metropolitan area. The core cities are ten miles to the east of Mapleton. The Maple River's path runs right through the city, and that's how Mapleton got its name.