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- (Masisi Territory) Olahi
- (Masisi Territory) Omongo
- (Masisi Territory) Omongo
- (Masisi Territory) Omaseraka
- (Rutshuru Territory) Omalia
- (Masisi Territory) Olondo
- (Masisi Territory) Oloke
- (Rutshuru Territory) Oliokwo
- (Rutshuru Territory) Olimungo
- (Masisi Territory) Olife
- (Lubero) Olendi
- (Kabinda) Olema
- (Masisi Territory) Opala
- (Masisi Territory) Okonolene
- (Rutshuru Territory) Okongo
- (Masisi Territory) Okeni
- (Masisi Territory) Okasa
- (Masisi Territory) Ohuna
- (Masisi Territory) Ohombi
- (Rutshuru Territory) Obongena
- (Rutshuru Territory) Obomongo
- (Kabinda) Obengebenge
- (Kabinda) Obengebenge
- (Masisi Territory) Osongi II
- (Ango) Owama
- (Masisi Territory) Otunga
- (Masisi Territory) Otunga
- (Masisi Territory) Otoko
- (Masisi Territory) Otikolieni
- (Masisi Territory) Otelakoi