The community of Rex is located just east of Highway 42. It is the home of Rex Mill, a historic grain mill sitting along the banks of Big Cotton Indian Creek. Although the mill has not functioned for decades, many long term residents of the area still remember it being in operation.
Rex Mill is listed on the National Register of Historic Places It was build by I.L. Hollingsworth and is named after his dog Rex. Years later the town was named after the mill. It is located on Rex Road in Clayton County, Georgia and was built around 1830. It was built as a Grist Mill where they ground corn.
Crossing the creek at the mill is an old steel bridge which allows only one-way traffic (controlled by stop lights at each end). Clayton County is in the process of rerouting the roadway and leaving the old bridge open to pedestrian traffic only.
There is very little available history about Rex, Ga. In the 1930's and 1940's, farmers used to bring their grain by horse pulled carriages from as far away as Lakewood Heights (now part of southeast Atlanta) to be processed at Rex Mill.