The original county seat was Campbellton, however when the Atlanta & West Point Railroad began to plan its route, the town's residents said no due to noise concerns. The tracks were laid through Fairburn instead, which flourished while Campbellton died out, and soon became the new county seat in 1870.
The map at right shows Campbell County (dark red) prior to the merger with Fulton. The county to the northwest of it is Douglas, formerly part of Campbell.
The land was taken from Fayette, Coweta, and Carrollcounties, and from the half of DeKalb County which became FultonCounty soon afterward.
The original county seat was Campbellton, however when the Atlanta & West Point Railroad began to plan its route, the town's residents said no due to noise concerns.
The remainder of CampbellCounty was ceded to Fulton at the end of 1931, along with Milton County, to save money during the Great Depression.