O
- (Kankan Prefecture) Ouranbaya
- (Mandiana Prefecture) Orobako
- (Kissidougou) Ouadou
- (Siguiri Prefecture) Ouagna
- (Siguiri Prefecture) Ouandan
- (Siguiri Prefecture) Ouaran
- (Mandiana Prefecture) Ouassala Kalila
- (Mandiana Prefecture) Ouassamana
- (Siguiri Prefecture) Oudoula
- (Kankan Prefecture) Oulondougou
- (Mandiana Prefecture) Oulo Ouloko
- (Mandiana Prefecture) Ouloubatinti
- (Kankan Prefecture) Ouloukoro
- (Kankan Prefecture) Oumalé
- (Kissidougou) Oumbaya
- (Mandiana Prefecture) Ourala
- (Siguiri Prefecture) Oyo
- (Siguiri Prefecture) Ouria
- (Mandiana Prefecture) Ouriala
- (Mandiana Prefecture) Ourianinouna
- (Kankan Prefecture) Ourokoro
- (Kissidougou) Ourou
- (Kankan Prefecture) Ouroubékoro
- (Mandiana Prefecture) Ourougada
- (Kouroussa) Ourouko
- (Kissidougou) Ouroukoro
- (Mandiana Prefecture) Ouroumakoro
- (Mandiana Prefecture) Ourouninda
- (Siguiri Prefecture) Ourouogada
- (Kerouane Prefecture) Oussoudougou