Macheng is a city in northeastern Hubei province, People's Republic of China, bordering the provinces of Henan to the north and Anhui to the northeast. It is a county-level city under the administration of Huanggang City and abuts the south side of the Dabie Mountains. The city's administrative area covers about 3,747 square kilometres (1,447 sq mi), and includes some 704 villages and small towns. Total population was 849,092 at the 2010 census.

Huanggang is a prefecture-level city in easternmost Hubei Province, China. It is situated to the north of the middle reaches of the Yangtze River and is bounded in the north by the Dabie Mountains and is named after Mount Huanggang. It borders Henan in the north, Anhui in the east and Jiangxi in the south.