| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obadakotuwa | city | North Western Province | Sri Lanka | 7.6333333 | 80.3333333 | 351 | 45406 |
| Obedagedere | city | North Western Province | Sri Lanka | 7.3 | 80.15 | 242 | 92078 |
| Obodagedara | city | North Western Province | Sri Lanka | 7.3 | 80.15 | 242 | 92078 |
| Obodakotuwa | city | North Western Province | Sri Lanka | 7.6333333 | 80.3333333 | 351 | 45406 |
| Odakkarai | city | North Western Province | Sri Lanka | 8.1333333 | 79.7 | 3 | 7372 |
| Oggamuwa | city | North Western Province | Sri Lanka | 7.2666667 | 80.1833333 | 282 | 92635 |
| Oggomuwa | city | North Western Province | Sri Lanka | 7.2666667 | 80.1833333 | 282 | 92635 |
| Oggomuwa | city | North Western Province | Sri Lanka | 7.55 | 80.3166667 | 433 | 45414 |
| Ogodapola | city | North Western Province | Sri Lanka | 7.6333333 | 80 | 98 | 45406 |
| Ogodapola | city | North Western Province | Sri Lanka | 7.4333333 | 80.3333333 | 482 | 45755 |
| Okandapola | city | North Western Province | Sri Lanka | 7.3666667 | 80.3166667 | 505 | 52278 |
| Olagama | city | North Western Province | Sri Lanka | 7.5166667 | 80.5 | 908 | 43069 |
| Olidivullewa | city | North Western Province | Sri Lanka | 7.95 | 80.3333333 | 331 | 45372 |
| Oligama | city | North Western Province | Sri Lanka | 7.6 | 80.1 | 383 | 45410 |
| Olindakadawela | city | North Western Province | Sri Lanka | 7.8 | 80.3833333 | 488 | 45386 |
| Olindankadawala | city | North Western Province | Sri Lanka | 7.8 | 80.3833333 | 488 | 45386 |
| Oliyamulla | city | North Western Province | Sri Lanka | 7.4333333 | 80.4333333 | 646 | 47245 |
| Olukkiliya | city | North Western Province | Sri Lanka | 8.05 | 79.95 | 121 | 30003 |
| Olupeliyawa | city | North Western Province | Sri Lanka | 7.6166667 | 79.9833333 | 72 | 45150 |
| Olupeliyawa | city | North Western Province | Sri Lanka | 7.8 | 80.1 | 219 | 45386 |
| Olupeliyawa | city | North Western Province | Sri Lanka | 7.45 | 80.35 | 498 | 46257 |
| Omaragolla | city | North Western Province | Sri Lanka | 7.7 | 80.5333333 | 1023 | 39959 |
| Oruliyadda | city | North Western Province | Sri Lanka | 7.3166667 | 80.3 | 393 | 58083 |
| Otara Bemmullegedara | city | North Western Province | Sri Lanka | 7.3833333 | 80.2166667 | 383 | 45431 |
| Otara Tambarawila | city | North Western Province | Sri Lanka | 7.2833333 | 79.8833333 | 16 | 104077 |
| Otarakiriwanapola | city | North Western Province | Sri Lanka | 7.3 | 80.1833333 | 406 | 69151 |
| Otaravadiya | city | North Western Province | Sri Lanka | 7.2833333 | 79.9333333 | 36 | 122005 |
| Otarawadiya | city | North Western Province | Sri Lanka | 7.2833333 | 79.9333333 | 36 | 122005 |
| Otegama | city | North Western Province | Sri Lanka | 7.6166667 | 80.1 | 200 | 45410 |
| Othegama | city | North Western Province | Sri Lanka | 7.5 | 79.9333333 | 59 | 41510 |
| Otherabemmullegedera | city | North Western Province | Sri Lanka | 7.3833333 | 80.2166667 | 383 | 45431 |
| Otherakiriwanapola | city | North Western Province | Sri Lanka | 7.3 | 80.1833333 | 406 | 69151 |
| Ottapanai | city | North Western Province | Sri Lanka | 7.8208333 | 79.7883333 | 6 | 12311 |
| Ottapanai Periya | city | North Western Province | Sri Lanka | 7.8208333 | 79.7883333 | 6 | 12311 |
| Ottapanai Sinna | city | North Western Province | Sri Lanka | 7.8166667 | 79.7833333 | 16 | 12311 |
| Ottukulama | city | North Western Province | Sri Lanka | 7.9333333 | 80.1166667 | 229 | 36908 |
| Ottukulama | city | North Western Province | Sri Lanka | 8.0166667 | 80.25 | 305 | 45359 |
| Ottukulama | city | North Western Province | Sri Lanka | 8.0666667 | 80.2666667 | 318 | 43645 |
| Ottukulama | city | North Western Province | Sri Lanka | 8.0333333 | 80.3 | 301 | 44491 |
| Ottupillama | city | North Western Province | Sri Lanka | 7.6 | 79.95 | 68 | 41239 |
| Otuwela | city | North Western Province | Sri Lanka | 7.6333333 | 80.3833333 | 495 | 45406 |
| Owattewela | city | North Western Province | Sri Lanka | 7.4333333 | 80.4666667 | 551 | 51300 |
|
|