Rockdale County Jail is a historic building at 967 Milstead Ave. in Conyers, Georgia. It was built in 1897 and served as the jail for Rockdale County, Georgia from then until a new jail was built in 1968. It was entered into the National Register of Historic Places (NRHP) on August 26, 1982. It now serves as the headquarters for the Rockdale County Historical Society and is known as the Old Jail Museum.