| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| O Beng Mea Lea | city | Khett Siem Reab | Cambodia | 13.4666667 | 104.2333333 | 252 | 3878 |
| O Chaak | city | Khett Kampong Cham | Cambodia | 12.3166667 | 105.5666667 | 337 | 11060 |
| O Nimit | city | Khett Kampong Spoe | Cambodia | 11.3166667 | 104.6 | 252 | 36083 |
| O Pram | city | Khett Kampong Cham | Cambodia | 12.3166667 | 105.5166667 | 239 | 9499 |
| O Pran | city | Khett Kampong Cham | Cambodia | 12.3166667 | 105.5166667 | 239 | 9499 |
| O Pyam | city | Khett Kaoh Kong | Cambodia | 11.6338889 | 102.9219444 | 19 | 2740 |
| O Raing | city | Khett Mondol Kiri | Cambodia | 12.3333333 | 107.1833333 | 2404 | 1904 |
| O Rang | city | Khett Mondol Kiri | Cambodia | 12.3333333 | 107.1833333 | 2404 | 1904 |
| O Rangknay | city | Khett Kampong Thum | Cambodia | 12.95 | 105.5 | 246 | 1699 |
| O Rangnay | city | Khett Kampong Thum | Cambodia | 12.95 | 105.5 | 246 | 1699 |
| O Reang Auv | city | Khett Kampong Cham | Cambodia | 11.8 | 105.5166667 | 88 | 32688 |
| O Romchek | city | Khett Kampong Thum | Cambodia | 12.9166667 | 104.55 | 49 | 7067 |
| O Runteh | city | Khett Kampong Thum | Cambodia | 12.95 | 105.4333333 | 429 | 1699 |
| O Runten | city | Khett Kampong Thum | Cambodia | 12.95 | 105.4333333 | 429 | 1699 |
| O Rômchék | city | Khett Kampong Thum | Cambodia | 12.9166667 | 104.55 | 49 | 7067 |
| O Samnai | city | Khett Kampong Spoe | Cambodia | 11.7 | 104.65 | 118 | 27258 |
| O Sandan | city | Khett Kampong Chhnang | Cambodia | 12.1166667 | 104.7 | 55 | 15037 |
| O Sandao | city | Khett Kampong Chhnang | Cambodia | 12.1166667 | 104.7 | 55 | 15037 |
| O Srala | city | Khett Kampong Thum | Cambodia | 12.7333333 | 104.9833333 | 49 | 12697 |
| O Sre Klong | city | Khett Kampong Spoe | Cambodia | 11.3166667 | 104.3 | 255 | 5227 |
| O Sâmnai | city | Khett Kampong Spoe | Cambodia | 11.7 | 104.65 | 118 | 27258 |
| O Sândan | city | Khett Kampong Chhnang | Cambodia | 12.1166667 | 104.7 | 55 | 15037 |
| O Ta Yu | city | Khett Siem Reab | Cambodia | 13.4333333 | 104.1 | 121 | 13989 |
| O Tapu | city | | Cambodia | 12.8605556 | 102.5930556 | 551 | 1247 |
| O Tasek | city | Khett Kampong Thum | Cambodia | 12.6833333 | 104.7666667 | 29 | 8148 |
| O Tea | city | Khett Mondol Kiri | Cambodia | 12.9666667 | 107.3 | 780 | 266 |
| O Thnong | city | Khett Kampong Cham | Cambodia | 12.0666667 | 105.35 | 108 | 42899 |
| O Totung | city | Khett Kampong Chhnang | Cambodia | 12.2666667 | 104.6166667 | 82 | 18026 |
| O Téa | city | Khett Mondol Kiri | Cambodia | 12.9666667 | 107.3 | 780 | 266 |
| Odong | city | Khett Kampong Thum | Cambodia | 11.8 | 104.75 | 62 | 27778 |
| Odongk | city | Khett Kampong Thum | Cambodia | 11.8 | 104.75 | 62 | 27778 |
| Okbao | city | Khett Batdambang | Cambodia | 12.7833333 | 103.3666667 | 59 | 5188 |
| Olok | city | Khett Kampong Thum | Cambodia | 13.5166667 | 105.0833333 | 285 | 1839 |
| Om Theyk | city | Khett Kampong Chhnang | Cambodia | 11.8166667 | 104.6333333 | 88 | 15130 |
| Ong | city | Khett Kampot | Cambodia | 10.5666667 | 103.6333333 | 164 | 8508 |
| Or Sandao | city | Khett Kampong Chhnang | Cambodia | 12.1166667 | 104.7 | 55 | 15037 |
| Or Srala | city | Khett Kampong Thum | Cambodia | 12.7333333 | 104.9833333 | 49 | 12697 |
| Oreang | city | Khett Mondol Kiri | Cambodia | 12.3333333 | 107.1833333 | 2404 | 1904 |
| Ot Khben | city | Khett Kampong Spoe | Cambodia | 11.75 | 104.6666667 | 98 | 27988 |
| Ot Khbĕn | city | Khett Kampong Spoe | Cambodia | 11.75 | 104.6666667 | 98 | 27988 |
| Oudong | city | Khett Kampong Thum | Cambodia | 11.8 | 104.75 | 62 | 27778 |
| Oudong Tramong | city | Khett Kampong Chhnang | Cambodia | 12.0166667 | 104.65 | 101 | 12725 |
|
|