[3] The county was created on January 26, 1856, and was named for Hugh A. Haralson, a former Georgia congressman.

[4][5] Haralson County is part of the Atlanta-Sandy Springs-Roswell, GA metropolitan statistical area.

[7] As of the 2020 United States census, there were 29,919 people, 11,259 households, and 7,960 families residing in the county.

As of the 2010 U.S. census, there were 28,780 people, 10,757 households, and 7,820 families living in the county.

[22] The county was originally governed by a sole Commissioner of Roads and Revenues.

The county is now governed by a five-member Board of Commissioners, which replaced the single-commissioner form beginning with the term starting in January 2005.