Buchanan is a city and the county seat of Haralson County, Georgia, United States. The population was 1,104 at the 2010 census, up from 941 at the 2000 census.

Haralson County is a county located in the northwestern part of the U.S. state of Georgia. As of the 2020 census, the population was 29,919, up from 28,780 in 2010. The county seat is Buchanan. The county was created on January 26, 1856, and was named for Hugh A. Haralson, a former Georgia congressman.