Backus is a city in Cass County, Minnesota, United States. The population was 250 at the 2010 census. It is part of the Brainerd Micropolitan Statistical Area.
According to the United States Census Bureau, the city has a total area of 0.6 square miles (1.6 km²), all of it land.
Minnesota State Highways 87 and 371 are two of the main routes in the community.