Deer River is a city in Itasca County, Minnesota, United States.

Deer River has a site on the National Register of Historic Places, the Itasca Lumber Company Superintendent's House, built in 1904 by the leading lumber company in the area.

[7] According to the United States Census Bureau, the city has a total area of 1.29 square miles (3.34 km2), all land.

39.8% of all households were made up of individuals, and 19.4% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 84.05% White, 12.07% Native American, 0.22% Asian, and 3.65% from two or more races.

39.3% of all households were made up of individuals, and 24.7% had someone living alone who was 65 years of age or older.