Mongalla or Mangalla is a Payam in Juba County, Central Equatoria State in South Sudan, on the east side of the Bahr al Jebel or White Nile river. It lies about 75 km by road northeast of Juba. The towns of Terekeka and Bor lie downstream, north of Mongalla.
During the colonial era, Mongalla was capital of Mongalla Province, which reached south to Uganda and east towards Ethiopia. On 7 December 1917 the last of the northern Sudanese troops were withdrawn from Mongalla, replaced by Equatorial troops. These southern and at least nominally Christian troops remained the only permanent garrison of the town and province until their mutiny in August 1955. Mongalla and the surrounding province was then absorbed into Equatoria Province in 1956. The town was taken and retaken more than once during the Second Sudanese Civil War (1983–2005).
