- Sandichena
- Sangattikulama
- Sanguthtattana
- Sankadayagama
- Santiyakalli
- Sedarawela
- Seguwantivu
- Sellankandal
- Semairippuwa
- Sembagama
- Sembattai
- Sembukattiya
- Sembukuliya
- Sembukuliya
- Sendiriyamulla
- Sengaloya
- Sengavelliya
- Serakkuliya
- Serugodayaya
- Serukele
- Setapolai
- Simatodwawa
- Simaveli North
- Sindattiriya
- Singakkuliya
- Sinhala Ihalagama
- Sinna Kattakaduwa
- Sinna Naga Villu
- Sinna Ottapanai
- Sinnakudirippu