Khartoum (state)
Khartoum State () is one of the eighteen states of Sudan. Although it is the smallest state by area (22,142 km), it is the most populous (5,274,321 in 2008 census). It contains the country's second largest city by population, Omdurman, and the city of Khartoum, which is the capital of the state as well as the national capital of Sudan. The capital city contains offices of the state, governmental and non-governmental organizations, cultural institutions, and the main airport.
Wau State
The capital of Wau State is the city of Wau. The city of Wau is located on the Jur River in the state, and it is the second largest city in the country with an estimated population of 151,320 people in 2008. Wau, South Sudan has its own airport, and the city is located 650 kilometers (404 miles) from Juba, the capital.