Millington is a city in Shelby County, Tennessee. As of the 2010 census, it had a population of 10,176. Millington was the home of the recently closed Memphis Motorsports Park. 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 closed in 1993. There is also now a civilian general aviation airport for jets and propeller-driven airplanes at the site.
Millington is at 35°20′12″N 89°54′8″W / 35.33667°N 89.90222°W / 35.33667; -89.90222 (35.336566, -89.902132).
According to the United States Census Bureau, the city has a total area of 15.6 square miles (40 km2), of which 0.04 square miles (0.10 km2), or 0.13%, is water.