Campbell County, Georgia

Campbell County was a county of the U.S. state of Georgia from 1828 (1828) to 1931 (1931). It was created by the state legislature on December 20, 1828, from land taken from Fayette, Coweta, and Carroll counties, and from the half of DeKalb County which became Fulton County soon afterward. Georgia's Cherokee Land Lottery of 1832 also added to the county. The county was named for Duncan G. Campbell, one of the U.S. commissioners responsible for the Treaty of Indian Springs.

The original county seat was Campbellton. In 1854 the Atlanta and West Point Railroad routed its tracks through Fairburn, Georgia instead, which flourished while Campbellton died out, and Fairburn became the county seat in 1870. The Campbell County Courthouse at Fairburn is listed on the National Register of Historic Places.

The northwestern half of Campbell (and a bit more of Carroll) became Douglas County in 1870, divided on October 17 at the Chattahoochee River. The remainder of Campbell County was ceded to Fulton County at the end of 1931, along with Milton County, Georgia The legislation creating the merger was enacted on August 9, 1929, with Milton being added to the process in 1931.