Mitchellville is a city located in Sumner County, Tennessee. As of the 2000 census the population was 207. The median age was 35 years and for every 100 females there were 115.6 males. Mitchellville has no Mayor for the city. Local businesses include Portland Express Inc and Orkin. Sumner County is part of the Nashville-Davidson–Mufreesboro–Franklin Metropolitan Statistical Area. It is named after Revolutionary War figure Jethro Sumner. Sumner County is located in Middle Tennessee along the northern boundary of the state, on the border with Kentucky. Schools in the county are governed by the Sumner County Board of Education. The twelve-member group consists of eleven elected representatives from each of the eleven educational districts in the county, as well as the Director of Schools. Some of the schools include Beech Elementary School and Beech Senior High School. Sumner County has and Annual Yard & Garage Sale every summer to benefit the Humane Society of Sumner County.