South Sudan contains the administrative territorial entity Jonglei
Bahr el GhazalNorthern Bahr el Ghazal
Western Bahr el Ghazal
Lakes
WarrapEquatoriaWestern Equatoria
Central Equatoria (containing the national capital city of Juba)
Eastern EquatoriaGreater Upper NileJonglei
Unity
Upper NileThe Abyei Area, a small region of Sudan bordering on the South Sudanese states of Northern Bahr el Ghazal, Warrap, and Unity, was given special administrative status as a result of the Comprehensive Peace Agreement signed in 2005.  Following the independence of South Sudan in 2011, Abyei is considered to be simultaneously part of both the Republic of Sudan and the Republic of South Sudan, effectively a condominium. It was due to hold a referendum in 2011 on whether to join South Sudan or remain part of the Republic of Sudan, but in May 2011, the Sudanese military seized Abyei, and it is not clear if the referendum will be held.
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