Crosby is a city in Crow Wing County, Minnesota, United States. The population was 2,386 at the 2010 census. It is part of the Brainerd Micropolitan Statistical Area. Crosby is adjacent to its twin city of Ironton, in the Cuyuna iron range.

Crow Wing County is a county in the East Central part of the U.S. state of Minnesota. As of the 2020 census, the population was 66,123. Its county seat is Brainerd. The county was formed in 1857, and was organized in 1870.