Gainesville is a city and the county seat of Hall County, Georgia, United States. As of the 2020 census, the city had a population of 42,296. Because of its large number of poultry processing plants, it has been called the "Poultry Capital of the World." Gainesville is the principal city of the Gainesville, Georgia Metropolitan Statistical Area, which is included in the Atlanta–Sandy Springs–Gainesville, Georgia Combined Statistical Area.

Hall County is a county located in the northeast portion of the U.S. state of Georgia. As of the 2020 census, the population was 203,136, up from 179,684 at the 2010 census. The county seat is Gainesville. The entirety of Hall County comprises the Gainesville, Georgia, Metropolitan Statistical Area, which is also part of the Atlanta-Athens-Clarke County-Sandy Springs, Combined Statistical Area.