Cuyuna is a city in Crow Wing County, Minnesota, United States. The population was 332 at the 2010 census. It is part of the Brainerd Micropolitan Statistical Area. The city lies within its namesake, the Cuyuna Range, a line of iron-bearing hills in central Minnesota. Cuyuna was one of the mining towns along the range, part of a list including Crosby, Ironton, Trommald, and Manganese.