South Sudan

Oanagab, Lakes → Oanbut, Upper Nile → Obai Dego, Upper Nile → Obodhiang, Upper Nile → Obor, Jonglei → Obwa, Upper Nile → Obwi, Upper Nile → Odesan, Western Bahr al Ghazal → Odio, Western Equatoria → Odulubo, Central Equatoria → Odwar, Upper Nile → Odwoigo, Upper Nile → Offio, Western Bahr al Ghazal → Ofyu, Upper Nile → Ogali, Western Bahr al Ghazal → Ogang, Upper Nile → Ogod Butu, Upper Nile → Ogod Famad, Upper Nile → Ogon, Upper Nile → Ogra, Upper Nile →