Western Bahr el Ghazal was one of the states of South Sudan. It had an area of 93900 km2 and was the least populous state in South Sudan, according to the controversial Sudanese census conducted in 2008. It was part of the Bahr el Ghazal region. Its capital was Wau. The state shared international borders with Sudan to the north and the Central African Republic to the west. The portion now occupied by Raga County (pronounced 'Raja') is the southern part of the historical region known as "Dar Fertit".
Local ethnic groups included the Luo (The Original natives of Wau), and Balanda Boor, Balanda Bviri, Balanda Deim Zubeir (Balanda Viri, Balanda Bagari)( Balanda are one people settling in different locations hence Dem Zubier, Bagari, Bazia and Tambura are geographical names not tribal. they were found in both western Equatoria and Western Bahar El Ghazal states), Luo, Ndogo, Kresh, Bai, Baggara Arabs, and many others. Despite the common element "Balanda" in their names, the first two ethnicities are not related. Despite frequent mentions of the existence of a "Fertit people" in Western Bahr el Ghazal, there is no such people.
This state, and Raga County in particular, was the part of South Sudan that was most affected by the slave trade conducted by nearby Muslim sultanates from the 18th century on and by Mameluk Egypt in the second half of the 19th century, and Raga County is the only part of South Sudan with a significant number of Muslims and Arabs. In addition to the Baggara Arabs, another local Muslim ethnic group is the Feroghe (Feroge, etc.). Traditionally, the northern part of Raga County falls within the "Baggara belt", the 1400 kilometer wide section of the central Sahel in which cattle herding Arabic speaking tribes conduct seasonal nomadic migrations. When the slave trade soared in the 1860s and 1870s, the region's population shrank dramatically, plunging by 75 percent to about 400,000. Depopulation was due to several factors all related to wars that were provoked by the upsurge in slaving promoted by Egypt, factors including: actual capture of inhabitants, emigration of refugees, and epidemics. The population according to the 2008 census was lower still. This may have been partly due to the second Sudanese civil war, 1983-1999, which devastated most of South Sudan, exacting a toll of two million dead civilians and hundreds of thousands of refugees.
Wau State, as with the other 28 states of South Sudan, was subdivided into counties; there were 8 counties, each headed by a County Commissioner:
The counties are further divided into Payams, then Bomas. South Sudan claims Kafia Kingi as part of Western Bahr el Ghazal with Sudan.