Tullahoma is a city in Coffee and Franklin counties in southern Middle Tennessee, United States. The population was 20,339 at the 2020 ce…Tullahoma is a city in Coffee and Franklin counties in southern Middle Tennessee, United States. The population was 20,339 at the 2020 census. In 2019, the population was estimated to be 19,555. It is the principal city of the Tullahoma micropolitan area, which consists of Coffee and Moore counties and is the second largest micropolitan area in Tennessee. The city is also partially in the Winchester Micropolitan area.