Japon
Villes commençant par o
- Ō-zanuki
- Ōami
- Ōamishirasato
- Ōarai
- Obama
- Obanazawa
- Obara
- Obata
- Obihiro
- Obirachō
- Obita
- Ōbu
- Obuchi
- Obuse
- Ochi
- Ochiai
- Ōdachō-ōda
- Ōdate
- Odawara
- Ōfunato
- Oga
- Ōgaki
- Ogasawara
- Ogawa
- Ogawa
- Ogawa
- Ogawamachi
- Ōgi
- Ogi
- Ōgimi
- Ogōri
- Ogōri-shimogō
- Ogura
- Ōgushi
- Ōhara
- Ōi
- Oikawa
- Ōiso
- Ōita
- Ōizumi-gakuenchō
- Ōizumimachi
- Ojiya
- Ōka
- Ōkawa
- Ōkawara
- Okaya
- Okayama
- Okazaki
- Okegawa
- Okinawa