- Seton Mains
- Sotuh Dog
- Spittal
- Saint Kilda
- Sandray
- Scalpay
- Scalpay Village
- Scarp
- Seaforth Island
- Seilebost
- Sgalpaigh
- Sgeir Cùl an Rubha
- Sgeir Dhomhuill
- Sgeir Righinn
- Sgeir Tamain
- Shawbost
- Sheshader
- Shiant Islands
- Shillay
- Shillay
- Shulishader
- Sibhinis
- Sildinis
- Soay
- Soay Mór
- Soray
- South Uist
- Spuir
- Stac a Langa
- Stac Dona