Filipinas
Países del mundo
O
- (Bohol) Oy
- (Province of Romblon) Oyan
- (Province of Samar) Oyandic
- (Province of Antique) Ouiligdon
- (Province of Surigao del Sur) Oteiza
- (Province of Samar) Obo
- (Bohol) Obuhan
- (Province of Pangasinan) Omando
- (Province of Sultan Kudarat) Oal
- (Eastern Manila District) Old Zaniga
- (Province of Northern Samar) Old Bucala Island
- (Province of Palawan) Oyster Island
- (Province of Samar) Oacon Islands
- (Province of Capiz) Olotayan Island
- (Province of Negros Oriental) Olympia Island
- (Province of Tawi-Tawi) Omapuy Island
- (Province of Eastern Samar) Oras Island
- (Province of Basilan) Orell Island
- (Province of Romblon) Origon Islet
- (Province of Quezon) Orista Island
- (Province of Davao Oriental) Oak Island
- (Province of Camarines Sur) Ocata Island
- (Province of Palawan) Oco Island
- (Province of Palawan) Oson Island
- (Province of Iloilo) Ojastras Island
- (Province of Cebu) Olango Island
- (Province of Davao del Sur) Olanivan Island
- (Province of Zamboanga del Sur) Olutanga Island