Filipinas

O

• (Province of Zambales) Olongapo
• (Province of Leyte) Ormoc
• (Province of Misamis Occidental) Ozamiz City
• Ozamis
• (Province of Bulacan) Obando
• (Province of Bataan) Orion
• (Province of Bataan) Orani
• Oroquieta
• (Province of Iloilo) Oton
• (Province of Cebu) Ocaña
• (Province of Eastern Samar) Oras
• (Province of Zamboanga del Norte) Olingan
• (Province of Zamboanga Sibugay) Olutanga
• (Province of Negros Occidental) Orong
• (Province of Romblon) Odiongan
• (Province of Cebu) Obong
• (Province of Palawan) Osmeña
• (Province of Negros Occidental) Odiong
• (Province of Misamis Oriental) Odiongan
• (Province of Cebu) Oslob
• (Province of Misamis Oriental) Opol
• (Province of Negros Oriental) Okiot
• (Oriental Mindoro) Odiong
• (Cotabato) Osias
• (Province of Cebu) Owak
• (Province of Cebu) Ocoy
• Okoy
• (Occidental Mindoro) Odala
• (Province of Sorsogon) Ogod
• (Province of Masbate) Osmeña