Fairmount is a city in Richland County, North Dakota, United States. The population was 367 at the 2010 census. Fairmount was founded in 1884. It is part of the Wahpeton, ND–MN Micropolitan Statistical Area.
Fairmount is located at 46°3′16″N 96°36′6″W (46.054393, -96.601642) and sits in southeastern North Dakota on North Dakota Highway 11. It is approximately four miles west of the junction of Minnesota Highway 55 and U.S. Route 75. Fairmount is six miles west of Tenney, Minnesota, 63 miles south of Fargo, and 176 miles northwest of Minneapolis, Minnesota. The village is also 15 miles East of Hankinson and 15 miles south of Wahpeton.
According to the United States Census Bureau, the city has a total area of 0.32 square miles (0.83 km2), all land.
As of the census of 2010, there were 367 people, 153 households, and 98 families living in the city. The population density was 1,146.9 inhabitants per square mile (442.8/km2).