- Ōkubochō-eigashima
- Ōkubochō-nishiwaki
- Ōkubochō-ōkubo
- Osaki
- Ōshima
- Okuikechō
- Ōshiochō
- Ōtsuku-kibi
- Ōtsuku-tenma
- Ōta
- Ogino
- Ōjika
- Ono
- Ōhata
- Okamoto
- Ōgi
- Ōgochō-kitahata
- Ōgochō-kitaso’o
- Ōgochō-kizu
- Ōgochō-kōda
- Ōgochō-mikage
- Ōgochō-nose
- Ōgochō-ōgo
- Onohamachō
- Oshibedanichō-kōmi
- Oshibedanichō-nishimori
- Oshibedanichō-oshibe
- Oshibedanichō-wada
- Ōzōchō-hisaibara
- Ōzōchō-kamiōzō