- Sabden
- Sacriston
- Saffron Walden
- Saint Agnes
- Saint Andrews Quay
- Saint Bees
- Saint Boswells
- Saint Clears
- Saint Columb Major
- Saint Combs
- Saint Cyrus
- Saint Dennis
- Saint Fergus
- Saint Just
- Saint Leonards-on-Sea
- Saint Monans
- Saint Neots
- Saint Osyth
- Saint Peters
- Saint Stephen
- Saintfield
- Salcombe
- Sale
- Salford
- Salford Priors
- Salfords
- Salhouse
- Saline
- Salisbury
- Salsburgh
- Saltash
- Saltburn-by-the-Sea
- Saltcoats
- Saltfleet
- Saltford
- Salthouse
- Sampford Peverell
- Sancton
- Sandbach
- Sandbank
- Sandford
- Sandford
- Sandford
- Sandhaven
- Sandhurst
- Sandown
- Sandwich
- Sandwick
- Sandwick
- Sandy
- Sanquhar
- Sapcote
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- Saughall
- Saundersfoot
- Sawbridgeworth
- Sawston
- Sawtry
- Saxby All Saints
- Saxilby
- Saxlingham Nethergate
- Saxmundham
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- Scamblesby
- Scarborough
- Scarcroft
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- Scole
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- Scotby
- Scothern
- Scotter
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- Scruton
- Sculthorpe
- Scunthorpe
- Sea Palling
- Seafield
- Seafield
- Seaford
- Seagrave
- Seaham
- Seahouses
- Seascale
- Seaton
- Seaton Delaval
- Seaton Ross
- Seaview
- Seavington st. Mary
- Seavington st. Michael
- Sedbergh
- Sedgeberrow
- Sedgebrook
- Sedgefield
- Sedgeford
- Sedlescombe
- Seend
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- Seething
- Seghill
- Seisdon
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- Selby
- Selkirk
- Sellindge
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- Semington
- Send
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- Settle
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- Seven Sisters
- Sevenoaks
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- Shere
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- Shipdham
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- Shipton
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- Shiptonthorpe
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- Shirley
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- Silverton
- Simister
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- Stamford Bridge
- Stamfordham
- Stanbridge
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- Stanford-le-Hope
- Stanhoe
- Stanhope
- Stanion
- Stanley
- Stanley
- Stanmore
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- Stanwick
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- Star
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- Steeple
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- Steeton
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- Stepps
- Stevenage
- Stevenston
- Steventon
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- Stewartby
- Stewarton
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- Steyning
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- Stickford
- Stickney
- Stillington
- Stilton
- Stirling
- Stithians
- Stock
- Stockbridge
- Stockport
- Stocksbridge
- Stocksfield
- Stockton
- Stockton Heath
- Stockton on the Forest
- Stockton-on-Tees
- Stogumber
- Stogursey
- Stoke by Clare
- Stoke Canon
- Stoke Ferry
- Stoke Fleming
- Stoke Gabriel
- Stoke Gifford
- Stoke Golding
- Stoke Goldington
- Stoke Hammond
- Stoke Holy Cross
- Stoke Poges
- Stoke Prior
- Stoke St Michael
- Stoke-by-Nayland
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- Stokenchurch
- Stokenham
- Stokesley
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- Stone
- Stone
- Stone
- Stone
- Stone
- Stonehaven
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- Stonehouse
- Stoneleigh
- Stonesfield
- Stoney Stanton
- Stoney Stratton
- Stoneyburn
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- Stornoway
- Storrington
- Stotfold
- Stourbridge
- Stourpaine
- Stourport-on-Severn
- Stourton Caundle
- Stow
- Stow
- Stow cum Quy
- Stow on the Wold
- Stowbridge
- Stowmarket
- Strabane
- Stradbroke
- Stranraer
- Stratfield Mortimer
- Stratford-upon-Avon
- Strathaven
- Strathblane
- Strathkinness
- Strathmiglo
- Strathpeffer
- Stratton
- Stratton Audley
- Stratton-on-the-Fosse
- Streatley
- Street
- Streetly
- Strensall
- Strete
- Stretford
- Stretham
- Stretton on Fosse
- Strichen
- Stromeferry
- Stromness
- Strone
- Strood
- Stroud
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- Studham
- Studland
- Studley
- Sturminster Marshall
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- Sturry
- Sturton le Steeple
- Stuston
- Stutton
- Sudbrook
- Sudbrooke
- Sudbury
- Sulgrave
- Sunbury-on-Thames
- Sunderland
- Sundridge
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- Sutton
- Sutton
- Sutton Benger
- Sutton Bonington
- Sutton Bridge
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- Sutton in Ashfield
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- Sutton on Trent
- Sutton Scotney
- Sutton upon Derwent
- Sutton Veny
- Swadlincote
- Swaffham
- Swaffham Bulbeck
- Swaffham Prior
- Swainby
- Swanage
- Swanbourne
- Swanley
- Swanmore
- Swanscombe
- Swansea
- Swardeston
- Swarland
- Swarthmoor
- Swaton
- Swavesey
- Sway
- Swayfield
- Swillington
- Swimbridge
- Swinderby
- Swindon
- Swinefleet
- Swineshead
- Swinford
- Swinton
- Swithland
- Swynnerton
- Symbister
- Symington
- Symington
- Syresham
- Syston
- Sywell
