Wales
S
- Sageston
- Sain Dunwyd
- Sain Ffagan
- Sain Nicolas
- Sain Tathan
- Saint Andras
- Saint Asaph
- Saint Clears
- Saint Davids
- Saint Hilari
- Saint-y-brid
- Saith Ffynnon
- Saith-aelwyd
- Salem, Wales
- Salem, Ceredigion
- Salem, Gwynedd
- Saltmarsh
- Saltmead
- Saltney Ferry Road
- Sandfields Road
- Sandy, Carmarthenshire
- Sandy Haven
- Sandy Lane, Swansea
- Sandy Lane, Wrexham
- Sandygate, Wales
- Sardis, Wales
- Sardis, Carmarthenshire
- Sardis, Pembrokeshire
- Sardis Mountain
- Sarn, Wales
- Sarn, Powys
- Sarn, Wrexham
- Sarn Bach
- Sarn Mellteyrn
- Sarn Meyllteyrn
- Sarn-y-Bryn-Caled
- Sarnat Gwyn
- Sarnau, Wales
- Sarnau, Ceredigion
- Sarnau, Gwynedd
- Sarnau, Powys
- Sarnwen
- Saron, Wales
- Saron, Carmarthenshire
- Saron, Denbighshire
- Saron, Gwynedd
- Saron, Capel
- Saron, Pentre
- Sart, Court
- Saundersfoot
- Saw Mill
- Scadog, Wern
- Scafell
- Scethrog
- Scleddau
- Scollock Cross
- Scolton
- Scoveston
- Scrwgan
- Scudamore Common
- Scurlage
- Scwrfa
- Sealyham
- Seaside, Wales
- Sebastopol, Wales
- Sebastopol, Torfaen
- Sedbury
- Seion
- Senghenydd
- Senni, Heol
- Senny Bridge
- Seven Sisters, Neath Port Talbot
- Seven Wells
- Sgiwen
- Shelone
- Sherwood, Rhondda Cynon Taf
- Shingrig Road
- Shipping
- Shirenewton
- Shordley Hall
- Shotton, Flintshire
- Shotton, Higher
- Shwt
- Sibbersfield
- Sigingstone
- Silian
- Siliwen
- Siloh
- Silstwn
- Simpson, Pembrokeshire
- Simpson Cross
- Singleton, Swansea
- Singret
- Sirhowy
- Sirhywi
- Six Bells
- Skenfrith
- Skerryford
- Sketty
- Sketty, Lower
- Skewen
- Skokholm Island
- Skyborry
- Skyborry Green
- Skyborry, Nether
- Slade, Swansea
- Slade, Eastern
- Slade, The, Wales
- Slade, Western
- Slebech
- Sling, Gwynedd
- Sling, Isle of Anglesey
- Slough (Monmouthshire)
- Smelt, The
- Smithfield, Denbighshire
- Smithfield Green
- Smithfield Road
- Snatchwood
- Snead
- Soar, Wales
- Soar, Gwynedd
- Soar, Isle of Anglesey
- Soar, Powys
- Soar Hill
- Sodom
- Sodylt Bank
- Sofrydd
- Soldiers' Point
- Solfach
- Solfach Isaf
- Solfach Uchaf
- Solva
- Solva, Lower
- Solva, Upper
- Somerton, Newport
- Sontley
- Soughton
- South Beach
- South Cornelly
- South Gate
- Southend, Swansea
- Southerndown
- Southgate, Swansea
- Southsea, Wrexham
- Sowhill
- Spelter
- Spittal, Pembrokeshire
- Splott
- Splottlands
- Spon Green
- Spring Gardens, Wales
- Springfield, Caerphilly
- Square and Compass
- Square, The, Flintshire
- St Andrews Major
- St Ann's Head
- St Athan
- St Bride's Netherwent
- St Bride's-super-Ely
- St Brides
- St Brides Wentlooge
- St Dials
- St George, Conwy
- St George's, Vale of Glamorgan
- St Gwynan's
- St Harmon
- St Hilary, Vale of Glamorgan
- St Illtyd
- St Ishmael
- St Julians, Wales
- St Lythans
- St Martins, Caerphilly
- St Mary Hill
- St Maughans
- St Mellons
- St Nicholas, Wales
- St Nicholas, Vale of Glamorgan
- St Thomas
- St Twynnells
- St Woolos
- St. Andras
- St. Ann's, Pembrokeshire
- St. Briavels Common
- St. Brides-super-Ely (Llansanffraid-ar-Elai)
- St. George's-super-Ely
- St. Helen's, Swansea
- St. Hilari
- St. Illtyd (Llanhiledd)
- St. Mary Church, Vale of Glamorgan
- St. Maughan
- St. Petrox
- St. Pierre
- Stackpole
- Stackpole Elidor
- Stags Head
- Stammers
- Stanleytown
- Stanner, Powys
- Stansbatch
- Stansty
- Stapeley
- Star, Wales
- Staylittle, Wales
- Staylittle, Powys
- Stelvio
- Stembridge, Swansea
- Stepaside
- Stephen's Ford
- Steynton
- Stimmy Heath
- Stone Bridge
- Stoneleigh, Swansea
- Stop and Call
- Stormy Down
- Stow Park, Wales
- Stowe, Wales
- Strand
- Strand Park
- Strata Florida
- Street Dinas
- Street Lydan
- Streflyn
- Stryd
- Stryd-y-Facsen
- Stryt-cae-Rhedyn
- Stryt-issa
- Stryt-yr-Hwch
- Stubb, The
- Studdolph
- Sudbrook, Wales
- Sully
- Summer Hill, Newport
- Summer Hill, Wrexham
- Summerhill, Pembrokeshire
- Summerleaze
- Sutton, Pembrokeshire
- Sutton, Vale of Glamorgan
- Sutton Green, Wrexham
- Swanbridge
- Swansea
- Sweldon
- Swffryd
- Swiss Valley
- Swydd-Ffynnon
- Swyddffynnon
- Sycharth
- Sychdyn
- Sychtyn
- Sydallt
- Sylen
- Sylfaen
- Synod
- Synod Inn