O
- (Rikaze Diqu) Ogar
- (Rikaze Diqu) Ogma
- (Shannan Diqu) Oglasa
- (Shannan Diqu) Onggar
- (Nyingchi Prefecture) Oiqu
- (Qamdo Shi) Onda
- (Nagqu Shi) Omaciu
- (Shannan Diqu) Ora
- (Shannan Diqu) Oro
- (Nyingchi Prefecture) Ogpu
- (Shannan Diqu) Olung
- (Nagqu Shi) Omsumsumdo
- (Shannan Diqu) Oincun
- (Rikaze Diqu) Ouyun
- (Rikaze Diqu) Oulong
- (Rikaze Diqu) Ouji
- (Rikaze Diqu) Ouzi
- (Rikaze Diqu) Ourong
- (Rikaze Diqu) Ouduo
- (Rikaze Diqu) Oumudu
- (Rikaze Diqu) Oubudui
- (Rikaze Diqu) Ounuo
- (Nagqu Shi) Ombu
- (Qamdo Shi) Ouxi
- (Nyingchi Prefecture) Ounacun
- (Nagqu Shi) Oucuocun
- (Nyingchi Prefecture) Oubu
- (Nyingchi Prefecture) Oubacun
- (Nyingchi Prefecture) Oulongcun
- (Nagqu Shi) Oumanazongcun