| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Siddamulla | city | Western | Sri Lanka | 6.82 | 79.96 | 223 | 222318 |
| Sidurupitiya | city | Sabaragamuwa | Sri Lanka | 6.58 | 80.45 | 830 | 49348 |
| Sidurupitiyawatta | city | Sabaragamuwa | Sri Lanka | 6.58 | 80.46 | 830 | 47951 |
| Siduwa | city | Western | Sri Lanka | 7.13 | 79.89 | 9 | 244132 |