Millington is a city in Shelby County, Tennessee, United States. As of the 2010 census, it had a population of 10,176. Millington is the home of the Memphis International Raceway. It was granted the title "Flag City Tennessee" by the Tennessee State Legislature. The Naval Support Activity Mid-South is located at the former Memphis Naval Air Station, which was downsized in 1993. There is also now a civilian general aviation airport for jets and propeller-driven airplanes at the site.GeographyMillington is at .According to the United States Census Bureau, the city has a total area of, of which, or 0.13%, is water.The city is located in the Memphis Metropolitan Area, about 9mi north of Memphis. The metropolitan area has a population of approximately 1.2 million people. Millington is close to the Meeman-Shelby Forest State Park, Fort Pillow State Park, and the Mississippi River.