Wuhai is a prefecture-level city in Inner Mongolia Autonomous Region of the People's Republic of China. The city lies on the Huang He. Wuhai translates as black sea and is since 1976 a city.
At county level, Wuhai is composed of three municipalities. These are:
- Municipality Haibowan (海勃 湾区), 529 km ², 200,000 inhabitants;
- Municipality Hainan (海南 区), 1005 km ², 100,000 inhabitants;
- Municipality Wuda (乌达 区), 220 km ², 130,000 inhabitants.
Ethnic structure of the population Wuhais (2000)
Wuhai has a total area of 1754 km ² and according to census (2000) 427 553 inhabitants ( population density: 243,76 inhabitants / km ²).