S
- (Batticaloa District) Samantiaru
- (Trincomalee District) Senamvali
- (Trincomalee District) Sempadu
- (Batticaloa District) Seerankamadu
- (Batticaloa District) Sathurukondan
- (Trincomalee District) Sampoor
- (Trincomalee District) Sambaltivu
- (Trincomalee District) Sampalchenai
- (Trincomalee District) Sammanturai
- (Ampara District) Sammanturai
- (Batticaloa District) Sammanodai
- (Ampara District) Sengamuwa
- (Batticaloa District) Salampakerny
- (Ampara District) Saintamaruthu
- (Ampara District) Sagamam
- (Batticaloa District) Saddam Hussein Village
- (Ampara District) Samagipura
- (Ampara District) Sinna Pulaweli
- (Trincomalee District) Saliyapura
- (Trincomalee District) Sri Tissapura
- (Batticaloa District) Sittandikudi
- (Trincomalee District) Sunkankuli
- (Batticaloa District) Sunkankerni
- (Batticaloa District) Sorumunai Number Two
- (Batticaloa District) Sorumunai
- (Ampara District) Sorikalmunai
- (Trincomalee District) Soodaikuda
- (Batticaloa District) Sokampi
- (Batticaloa District) Sodayankulam
- (Ampara District) Siyambalagahamadama