- Sabaragama
- Sabhithagama Model Village
- Salamulla
- Salawa
- Samanabedda
- Sangarama
- Sapugaskanda
- Sarikkamulla
- Sathsiripaya
- Sayakkaramulla
- Sedawatta
- Seeduwa
- Seeniwatta
- Seethagama
- Senapura
- Senasungoda
- Serukana Colony
- Serupita
- Siddamulla
- Sigirakanda
- Silverdale
- Singhagama
- Singhapura
- Singharaja Udyanaya
- Sinharamolla
- Siri Abepura Colony
- Siribila
- Sivaralumulla
- Siyambalagoda
- Siyambalagoda