O
- (Province of Camiguin) Owakan
- (Province of Bukidnon) Omonay
- (Province of Bukidnon) Old Cosina
- (Province of Misamis Oriental) Ognas
- (Province of Bukidnon) Ocasion
- (Province of Misamis Oriental) Old Manticao
- (Province of Misamis Oriental) Opol
- (Province of Misamis Oriental) Odiongan
- (Province of Misamis Occidental) Ozamiz City