South Sudan- Central African Republic: periodic violent skirmishes persist among related pastoral populations along the border with the Central African Republic over water and grazing rights

South Sudan-Democratic Republic of the Congo: none identified

South Sudan-Ethiopia: the unresolved demarcation of the boundary and lack of clear limitation create substantial room for territorial conflict both locally among the border populations and between the two capitals; besides a large number of indigenous farmers, the border region supports refugees and various rebel groups opposed to the governments in Khartoum and Addis Ababa

South Sudan-Kenya: two thirds of the boundary that separates Kenya and South Sudan's sovereignty known as the Ilemi Triangle has been unclear since British colonial times; Kenya has administered the area since colonial times; officials from Kenya and South Sudan signed a memorandum of understanding on boundary delimitation and demarcation and agreed to set up a joint committee; as of July 2019, the demarcation process was to begin in 90 days, but was delayed due to a lack of funding

South Sudan-Sudan: present boundary represents 1 January 1956 alignment, which clearly placed the Kafia Kingi area (adjacent to Central African Republic) within South Sudan as shown on US maps although it is mostly occupied by Sudan; final alignment pending negotiations and demarcation; the final sovereignty status of Abyei Area pending negotiations between South Sudan and Sudan; clashes continue in the oil-rich Abyei region; the United Nations interim security Force for Abyei (UNISFA) has been deployed since 2011, when South Sudan became independent, Sudan accuses South Sudan of supporting Sudanese rebel groups

South Sudan-Uganda: none identified

none identified

Liberia-Guinea: none identified

Liberia-Sierra Leone: none identified