Barnum has a total area of about 2.7 sq. kms. It is located in the County of Carlton, Minnesota. A number of highways bisect this city. The location of Barnum is about 6 miles northeast of Lake Moose and southwest of Cloquet city. Barnum is located about 38 miles southwest from the city of Duluth.
The County fair of Carlton is held here on an annual basis. Tourism and trade are the principal sources behind the growth of the local economy.