Solen is a city in Sioux County, North Dakota, United States and on the Standing Rock Indian Reservation. The population was 83 at the 2010 census.Solen was founded in 1910 along a Northern Pacific Railway branch line that ran from Mandan to Mott. The name comes from Mary Louise Van Solen, a pioneer settler who was the first schoolteacher on the Standing Rock Indian Reservation.Solen has one high school, Solen Public High School, nicknamed the "Solen Sioux". The town has a gas station and automotive repair shop called Hoffman's Garage which has been family owned and operated since the early 1900s as well as a local bar, Last Chance Saloon.