- Sankin Island
- Santa Lucia Island
- Santa Rita Island
- Sarana Island
- Sarichef Island
- Sasby Island
- Sasedni Island
- Sauluktouchikh
- Savage Island
- Savonoski
- Sawmill Island
- Sawyer Island
- Saxton
- Scarab Rock
- Schooner Island
- Schooner Rock
- Schrader Island
- Schumachinskaia
- Scotland Rock
- Scott Island
- Scott Island
- Scottys Island
- Scow Bay
- Scow Island
- Scow Island
- Scrag Islands
- Scraggy Island
- Scraggy Islands
- Screen Islands
- Scrub Island