Mission Township is a civil township in Benson County, North Dakota, United States. As of the 2000 census, its population was 1,077. It is the most populous township in the county.HistoryMission Township was formed from Wood Lake School Township in the mid-1910s. The townships is named in honor of the mission school established here in 1874 by the Grey Nuns, a Roman Catholic religious institute from Montreal, Canada. The school was established through the efforts of Major William H. Forbes, the first Indian agent on the Fort Totten Reservation, as the Spirit Lake Reservation was then known.GeographyMission Township is located on the south short of Devils Lake on the Spirit Lake Reservation. It is roughly east of the community of Fort Totten and south of the city of Devils Lake. According to the United States Census Bureau, the township has a total area of 44.77sqmi, making it the 4th largest township in the county. 88% of the township is land. Devils Lake's Mission Bay shares the township's name.