| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Sedarawela | city | North Western Province | Sri Lanka | 7.5666667 | 79.8166667 | 29 | 20037 |
| Sedaraweli | city | North Western Province | Sri Lanka | 7.5666667 | 79.8166667 | 29 | 20037 |
| Sedawatta | city | Western Province | Sri Lanka | 6.9505556 | 79.8861111 | 6 | 306208 |
| Seeduwa | city | Western Province | Sri Lanka | 7.1166667 | 79.8833333 | 13 | 156693 |
| Seeniagaslanda | city | Province of Uva | Sri Lanka | 7.4166667 | 81.0166667 | 465 | 42091 |
| Seenigaslanda | city | Province of Uva | Sri Lanka | 7.4166667 | 81.0166667 | 465 | 42091 |
| Seenimodera | city | Southern Province | Sri Lanka | 6 | 80.75 | 3 | 11125 |
| Seeniwatta | city | Western Province | Sri Lanka | 6.4333333 | 80 | 3 | 68760 |
| Seerankamadu | city | North Eastern Province | Sri Lanka | 7.5333333 | 81.5833333 | 797 | 22100 |
| Seguwantivu | city | North Western Province | Sri Lanka | 8.0833333 | 79.8166667 | 16 | 14366 |
| Selagama | city | Central Province | Sri Lanka | 7.5833333 | 80.5833333 | 2001 | 37454 |
| Selagama Colony | city | Central Province | Sri Lanka | 7.5833333 | 80.5833333 | 2001 | 37454 |
| Selawa | city | Province of Sabaragamuwa | Sri Lanka | 7.15 | 80.5 | 1358 | 71504 |
| Selettimaduwa | city | North Central Province | Sri Lanka | 8.2 | 80.45 | 396 | 15495 |
| Sellankandal | city | North Western Province | Sri Lanka | 8.0333333 | 79.9 | 104 | 29996 |
| Sellaperumagama | city | North Western Province | Sri Lanka | 7.8666667 | 80.3166667 | 439 | 45382 |
| Sellaperumagana | city | North Western Province | Sri Lanka | 7.8666667 | 80.3166667 | 439 | 45382 |
| Semairippuwa | city | North Western Province | Sri Lanka | 7.5333333 | 79.8166667 | 9 | 19290 |
| Semairrippuwa | city | North Western Province | Sri Lanka | 7.5333333 | 79.8166667 | 9 | 19290 |
| Sembagama | city | North Western Province | Sri Lanka | 7.9166667 | 80 | 193 | 30459 |
| Sembattai | city | North Western Province | Sri Lanka | 7.9166667 | 79.8333333 | 52 | 24486 |
| Sembettai | city | North Western Province | Sri Lanka | 7.9166667 | 79.8333333 | 52 | 24486 |
| Sembukattiya | city | North Western Province | Sri Lanka | 7.5166667 | 79.85 | 49 | 29754 |
| Sembukulama | city | North Central Province | Sri Lanka | 8.2 | 80.5 | 374 | 15495 |
| Sembukuliya | city | North Western Province | Sri Lanka | 7.8 | 79.85 | 68 | 30022 |
| Sembukuliya | city | North Western Province | Sri Lanka | 7.8597222 | 79.9047222 | 104 | 30020 |
| Sembukuliya | city | North Central Province | Sri Lanka | 8.0166667 | 80.5833333 | 429 | 15502 |
| Sembuwawewa | city | North Western Province | Sri Lanka | 7.4333333 | 80.2333333 | 590 | 45427 |
| Semewa | city | North Central Province | Sri Lanka | 8.5833333 | 80.5833333 | 380 | 15481 |
| Sempadu | city | North Eastern Province | Sri Lanka | 8.6333333 | 81.2166667 | 13 | 6531 |
| Senadeerayagama | city | North Central Province | Sri Lanka | 8.0666667 | 80.6833333 | 534 | 15499 |
| Senadiriyagama | city | North Central Province | Sri Lanka | 8.0666667 | 80.6833333 | 534 | 15499 |
| Senamvali | city | North Eastern Province | Sri Lanka | 8.3666667 | 81.3833333 | 3 | 7216 |
| Senapathiya | city | Province of Uva | Sri Lanka | 7.0833333 | 81.2333333 | 1889 | 20672 |
| Senapatiya | city | Province of Uva | Sri Lanka | 7.0833333 | 81.2333333 | 1889 | 20672 |
| Senapura | city | North Central Province | Sri Lanka | 8.0833333 | 80.4666667 | 347 | 15499 |
| Senasungoda | city | Western Province | Sri Lanka | 6.9833333 | 80.1333333 | 308 | 249480 |
| Sendiriyamulla | city | North Western Province | Sri Lanka | 7.3 | 79.9333333 | 91 | 71246 |
| Sendiriyapitiya | city | North Western Province | Sri Lanka | 7.5 | 80.3333333 | 449 | 45424 |
| Sengaloya | city | North Western Province | Sri Lanka | 7.6833333 | 79.8333333 | 22 | 18610 |
| Sengamuwa | city | North Eastern Province | Sri Lanka | 6.8833333 | 81.7666667 | 78 | 16526 |
| Sengapadai | city | North Eastern Province | Sri Lanka | 7.3 | 81.7666667 | 75 | 16637 |
| Sengavelliya | city | North Western Province | Sri Lanka | 7.6833333 | 79.85 | 39 | 28094 |
| Sengelena | city | North Western Province | Sri Lanka | 7.4833333 | 80.4666667 | 610 | 46196 |
| Senkanthulam | city | North Eastern Province | Sri Lanka | 9.8166667 | 80 | 0 | 31506 |
| Senkara-attimoddai | city | North Eastern Province | Sri Lanka | 8.9 | 80.55 | 301 | 8947 |
| Seranegama | city | Province of Uva | Sri Lanka | 7.3666667 | 81.05 | 485 | 37184 |
| Serangoda | city | North Western Province | Sri Lanka | 7.6833333 | 80.3166667 | 400 | 45400 |
| Serankada | city | North Eastern Province | Sri Lanka | 7.45 | 81.2833333 | 505 | 16658 |
| Serankade | city | North Eastern Province | Sri Lanka | 7.45 | 81.2833333 | 505 | 16658 |
| Serudandapola | city | Central Province | Sri Lanka | 7.7333333 | 80.6666667 | 882 | 30304 |
| Serugolla | city | North Western Province | Sri Lanka | 7.4166667 | 80.25 | 820 | 45427 |
| Serugolla | city | North Western Province | Sri Lanka | 7.6833333 | 80.3 | 337 | 45400 |
| Serugolla | city | Central Province | Sri Lanka | 7.45 | 80.65 | 1781 | 36273 |
| Serukana | city | Western Province | Sri Lanka | 6.7333333 | 80 | 127 | 111867 |
| Serukele | city | North Western Province | Sri Lanka | 7.7333333 | 79.9166667 | 65 | 33466 |
| Serumurewewa | city | North Western Province | Sri Lanka | 7.8666667 | 80.2333333 | 351 | 45382 |
| Serunewa | city | North Central Province | Sri Lanka | 8.4333333 | 80.9333333 | 387 | 16213 |
| Serupita | city | Western Province | Sri Lanka | 6.6 | 80 | 269 | 87981 |
| Seruvila | city | North Eastern Province | Sri Lanka | 8.3666667 | 81.3166667 | 42 | 17887 |
| Seruvilla | city | North Eastern Province | Sri Lanka | 8.3666667 | 81.3166667 | 42 | 17887 |
| Seruwangoda | city | North Western Province | Sri Lanka | 7.4166667 | 80.1 | 321 | 45427 |
| Seruwawa | city | North Western Province | Sri Lanka | 7.5833333 | 80.3333333 | 485 | 45414 |
| Seruwawila | city | North Eastern Province | Sri Lanka | 8.3666667 | 81.3166667 | 42 | 17887 |
| Setapolai | city | North Western Province | Sri Lanka | 7.9666667 | 79.7833333 | 22 | 13748 |
| Sethappaduwa | city | Western Province | Sri Lanka | 7.1333333 | 79.8333333 | 3 | 52153 |
| Seththikulama | city | North Central Province | Sri Lanka | 8.1166667 | 80.55 | 498 | 15498 |
| Sethukuda | city | North Eastern Province | Sri Lanka | 7.7 | 81.6833333 | 9 | 23128 |
| Settappaduwa | city | Western Province | Sri Lanka | 7.1333333 | 79.8333333 | 3 | 52153 |
| Sewanpitiya | city | North Central Province | Sri Lanka | 7.9333333 | 81.15 | 452 | 14294 |
| Sewendana | city | North Western Province | Sri Lanka | 7.2833333 | 79.95 | 39 | 122005 |
| Sewendana | city | North Western Province | Sri Lanka | 7.35 | 80.2166667 | 387 | 46131 |
| Sewendana | city | North Western Province | Sri Lanka | 7.4166667 | 80.25 | 820 | 45427 |
| Sewendena | city | North Western Province | Sri Lanka | 7.35 | 80.2166667 | 387 | 46131 |
| Sewendera | city | North Western Province | Sri Lanka | 7.4166667 | 80.25 | 820 | 45427 |
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