Regions of Philippines
- Oras Island
- Ona
- Omuntol Point
- Omotot
- Omosmarta
- Omosdang
- Omon River
- Omon River
- Omon Point
- Omonay
- Omon
- Omon
- Omod
- Omjon
- Omio
- Omiles Creek
- Omid Shoulder
- Omid Peak
- Omidop
- Mount Omdoy
- Ombao
- Omauas
- Omauas
- Omapuy Reef
- Omapuy Island
- Omapad
- Umanod
- Omando
- Omambong
- Omalo
- Omalo
- Omagit
- Olympia Island
- Olyaoyao
- Oluulu River
- Olotayan Island
- Olutanga Island
- Olutanga
- Olutanga
- Oluangan
- Mount Oltaloro
- Oloybuaya
- Olotayan
- Oro River
- Olorga
- Olo Point
- Olo-Olo Norte
- Mount Olong Amo
- Olo-olo
- Olontano
- Olongtauo Ilaya
- Olongtao
- Olongo Peak
- Olongapo Naval Reservation
- Olongapo City
- Olongapo Bay
- Port Olongapo
- Olongapo
- Ol-og
- Oloc
- Olo-Baroc
- Olo Cacamposan
- Olo
- Olmo
- Olla River
- Ollao
- Olla
- Olivo River
- Olivo
- Olituo
- Olisijan
- Olioeg
- Olingan
- Olingan
- Olympia
- Olimpia
- Hacienda Olimpo
- Olimbo
- Mount Olila
- Olicasto River
- Olicasto
- Olhay River
- Oleras
- Olera
- Olegario Creek
- Olea
- Old Verdu
- Tolong
- Old Tarazona
- San Pablo
- Old San Mariano
- Old San Agustin
- Old Salaman
- Old Sagay
- Old Rizal
- Pandanon
- Old Mobo
- Old Manunca
- Old Mahayag
- Old Lucban River
- Old Kidapawan
- Old Gumiad
- Old Cosina
- Old Clavijo
- Old Central
- Olayon
- Olayan
- Olay
- Olave
- Olas River
- Olasi
- Olas
- Olanivan Island
- Olango Island
- Olango Channel
- Olango
- Olango
- Olang
- Olanen River
- Olanen Bay
- Olanen
- Olandesa Point
- Olamian
- Mount Olagusan
- Olag Pequeño
- Okno Bay
- Okiot
- Okayan River
- Okayan Point
- Okayan Bay
- Okayan
- Ojot River
- Ojastras Island
- Ointambo
- Ohio
- Ohaon
- Oguis
- Oguis
- Oguis
- Ogton Point
- Ogtongon
- Ogsip
- Ogot River
- Ogos River
- Ogongo
- Ogod River
- Ogod
- Ogob
- Ognas
- Ogbong
- Ogbon
- Ogbac
- Ogao
- Oga
- Oeste - A
- Oem
- O’Donnell Southwest
- O’Donnell River
- O’Donnell
- Odol Point
- Odok
- Odoc River
- Odoc
- Odoc
- Odoc
- Odlumon
- Odlot
- Odiongan Bay
- Odiong River
- Odiongan River
- Odioñgan River
- Odiongan River
- Odiongan Bay
- Mount Odiongan
- Odiongan
- Odioñgan
- Odiongan
- Odiongan
- Odiongan
- Odiongan
- Odiong
- Odiong
- Odiong
- Odiong
- Odiong
- Odiong
- Odiong
- Odiong
- Odiong
- Odicon
- Odiao River
- Odiao Creek
- Odalo
- Oda
- Ocut River
- Ocop
- Oson Island
- Ocre Point
- Ocoy River
- Ocoy