Rex (also known as Hollingsworth) is an unincorporated community in Clayton County, Georgia, United States. Its elevation is 797 feet (243 m). Although Rex is unincorporated, it has a post office, with the ZIP code of 30273; the ZCTA for ZIP code 30273 had a population of 16,580 at the 2020 census.

History

A post office called Rex was established in 1882. Rex is a name derived from Latin meaning "king". The Georgia General Assembly incorporated Rex as a town in 1912. The town's municipal charter was repealed in 1922. The Historic Rex Village was identified as a place in peril by the 2011 Georgia Historic Trust.