S
- (Gampaha District) Sinharamolla
- (Kalutara District) Silverdale
- (Gampaha District) Seeduwa
- (Colombo District) Siddamulla
- (Kalutara District) Serupita
- (Gampaha District) Senasungoda
- (Kalutara District) Seeniwatta
- (Colombo District) Sedawatta
- Senanga
- Sesheke
- (Colombo District) Sri Jayewardenepura Kotte