Bryan County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 30,233. The county seat is Pembroke.Bryan County is part of the Savannah, GA Metropolitan Statistical Area.Bryan County is separated into two parts (North Bryan and South Bryan) due to the location of Fort Stewart in the middle of the county. The Bryan County Courthouse (Pembroke, Georgia) is listed on the National Register of Historic Places.