Ko te rohe o Dong'an kei te taha tonga o te rohe, kei te taha rawhiti o te rohe o Guangxi. Kei te taha raki o te rohe o Shaoyang, ki te rawhiti o te rohe o Lengshuitan, ki te tonga o te rohe o Lingling, Quanzhou County o Guangxi, ki te hauauru me te raki-hauauru o te rohe o Xinning. Ko te rohe o Dong'an e 2,204 km2 (851 sq mi), mai i te 2015, 643,179 te taupori kua rehitatia.
643,179 Ko te