McDonough is a city in Henry County, Georgia, United States. The population was 8,493 at the 2000 census. Census Estimates of 2008 indicate a population of 19,768. This is due both in part to growth of the city and extension of the city limits. Inclusion of the unincorporated neighborhoods surrounding McDonough, which are not part of a town/city, raises the population to approximately 30,000. This city is the county seat of Henry County. It is the home of AM radio station Classic Country 1410 WKKP and SCB-TV cable Channel 15 television station. Note: Information about challenges to population estimates data can be found on the Population Estimates Challenges page. Source: U.S. Census Bureau, 2008 Population Estimates According to the United States Census Bureau, the city has a total area of 7.8 square miles (20.2 km²), of which, 7.8 square miles (20.1 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.51%) is water. The census-designated place of Blacksville and the unincorporated communities of Flippen, Kelleytown, and Ola are located near McDonough, and addresses in those communities have McDonough postal addresses.