- Siargao Islands
- Sibahay
- Sibale Island
- Sibanac Island
- Sibukuan Island
- Silop
- Singag Island
- Siwata
- Small Kababacan Island
- Small Tinago Island
- Sogas
- Solion
- Somilihon
- Somosomo
- Songkit
- Soriano
- Sua Island
- Sua Islets
- Sugbu Diutay Islet
- Sugbu Islet
- Sugbuhan Island
- Suhoton
- Sumilihon
- Sumilon
- Sumilon Island
- Sur
- Suyoc
- Santa Ana
- San Luis
- Santa Maria