| City | Region |
|---|
| ›Salamulla | Western Province› |
| ›Sammanturai | Eastern› |
| ›Sampalthivu | Eastern› |
| ›Sampoor | Eastern› |
| ›Sandilipay | Northern› |
| ›Sangarathai | Northern› |
| ›Santhiveli | Eastern› |
| ›Saravanal | Northern› |
| ›Sathurukondan | Eastern› |
| ›Senthankulam | Northern› |
| ›Serunuwara | Eastern› |
| ›Seruvila | Eastern› |
| ›Silavathurai | North Western Province› |
| ›Sillalai | Northern› |
| ›Sinharagama | North Central Province› |
| ›Sittandy | Eastern› |
| ›Somapura | Eastern› |
| ›Sooriyapura | Eastern› |
| ›Sri Jayawardenepura Kotte | Western Province› |
| ›Suriyakanda | Sabaragamuwa› |
| ›Suriyawewa | Southern Province› |
| ›Suruvil | Northern› |
| ›Suthumalai | Northern› |
