Barnum is a city in Carlton County, Minnesota, United States. The population was 613 at the 2010 census.Interstate Highway 35, Carlton County Road 6 (Main Street), and Carlton County Road 61 (Front Street) are three of the main routes in Barnum.GeographyAccording to the United States Census Bureau, the city has a total area of 1.00sqmi, all of it land. It is located five miles northeast of Moose Lake and 33 miles southwest of the city of Duluth.CommunityBarnum is the home of the Carlton County Fair. The Fair takes place annually in August. Barnum is also home to the Barnum elementary and Barnum high school.Demographics2010 censusAs of the census of 2010, there were 613 people, 236 households, and 152 families residing in the city. The population density was 613.0PD/sqmi. There were 264 housing units at an average density of 264.0/sqmi. The racial makeup of the city was 92.0% White, 0.3% African American, 2.4% Native American, 0.2% Asian, and 5.1% from two or more races. Hispanic or Latino of any race were 0.8% of the population.