- Ogaden
- Ogagou
- Ågaki
- Ōgaki
- Ågaki-juku
- Ogallala
- OGame
- Ogami-jima
- Ågamiyama-jinja
- Ogam Celticum
- Ogan
- Oganesson
- Zanazanyan organer
- Ogano
- Ogan (flod)
- Ogar
- Ogardy
- Ogardzki MÅyn
- Ogarka
- OGAS
- Ogasawara
- Ogasawara-ryū
- Ogasawara (Tokyo)
- Ogasawara Heibei Tsuneharu
- Ogasawara Nagakiyo
- Ogasawara Nagakuni
- Ogasawara Nagamichi
- Ogasawara Nagashige
- Ogasawara Nagatoki
- Ogasawara Nagatsune
- Ogasawara Sadamune
- Ogasawara Tadanobu
- Ogasawara Tadazane
- Ogassa
- Ågata
- Ogata Gekko
- Ogata Kenzan
- Ogata Koan
- Ogata Korin
- Ogata no Saburo Koreyoshi
- Ogawa
- Ogawamachi (Tokyo metro)
- Ogawamachi (Tokyo)
- Ōgawara
- Ågawara
- Ogawa (Nagano)
- Ogawa (Saitama)
- Ogawa Kazumasa
- Ogawa Mataji
- Ogawa Mokichi
- Ogawa Suketada
- Oga (Akita)