Twin Towns in the UK
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| UK town | UK region | Overseas town/region | Overseas country |
| Saffron Walden | Essex | Bad Wildungen | Germany |
| Saint Davids | Pembrokeshire | Matsieng | Lesotho |
| Saint Davids | Pembrokeshire | Naas | Republic of Ireland |
| Saint Davids | Pembrokeshire | Orleat | France |
| Salcombe | Devon | Cabourg | France |
| Salford | Greater Manchester | Clermont-Ferrand | France |
| Salford | Greater Manchester | Lunen | Germany |
| Salford | Greater Manchester | Narbonne | France |
| Salford | Greater Manchester | St-Ouen | France |
| Salisbury | Wiltshire | Saintes | France |
| Salisbury | Wiltshire | Wennigsen | Germany |
| Saltash | Cornwall | Plougastel-Daoulas | France |
| Sampford Peverell | Devon | Notre-Dame-De-Courson | France |
| Sandford | Devon | Demouville | France |
| Sandhurst | Kent | Heuringhem | France |
| Sandown | Isle of Wight | St Pete Beach | USA |
| Sandown | Isle Of Wight | Tonnay-Charente | France |
| Sandwell | West Midlands | Le Blanc-Mesnil | France |
| Sandwich | Kent | Honfleur | France |
| Sandwich | Kent | Ronse (Renaix) | Belgium |
| Sandy | Bedfordshire | Skarszewy | Poland |
| Sandy | Bedfordshire | Malaunay | France |
| Sawbridgeworth | Hertfordshire | Bry-Sur-Marne | France |
| Sawston | Cambridgeshire | Selsingen | Germany |
| Sawtry | Cambridgeshire | Weimar/Lahn | Germany |
| Saxilby | Lincolnshire | Haarlemmerliede En-Spaarnwoude | Netherlands |
| Scarborough | North Yorkshire | Osterode Am Harz | Germany |
| Scopwick & Kirkby Green | Lincolnshire | Sceaux Sur Huisne | France |
| Scoriton | Devon | Fontaine-Henry | France |
| Scunthorpe | North Lincolnshire | Clamart | France |
| Scunthorpe | North Lincolnshire | Luneburg | Germany |
| Seaford | East Sussex | Bonningstedt | Germany |
| Seaham | Durham | Gerlingen | Germany |
| Seaton | Devon | Thury-Harcourt | France |
| Sedgefield | Durham | Hamminkeln | Germany |
| Sedgefield | Durham | Rheinhausen | Germany |
| Sedgemoor | Somerset | St Jean de Daye | France |
| Sedgemoor | Somerset | Schwalm-Eder Lk. | Germany |
| Sefton | Merseyside | Fort Lauderdale | USA |
| Sefton | Merseyside | Gdansk | Poland |
| Selby | North Yorkshire | Carentan | France |
| Seneley Green | Merseyside | Nienhagen | Germany |
| Settle | North Yorkshire | Banyuls-Sur-Mer | France |
| Sevenoaks | Kent | Ialomita County | Romania |
| Sevenoaks | Kent | Pontoise | France |
| Shaftesbury | Dorset | Brionne | France |
| Shaftesbury | Dorset | Lindlar | Germany |
| Shanklin | Coupvray | Seine et Marne | France |
| Shard End | West Midlands | La Duchere | France |
| Shebbear | Devon | Balleroy | France |
| Sheffield | South Yorkshire | Anshan | China |
| Sheffield | South Yorkshire | Pittsburgh | USA |
| Sheffield | South Yorkshire | Bocholt | Germany |
| Sheffield | South Yorkshire | Bochum | Germany |
| Sheffield | South Yorkshire | Donetsk | Ukraine |
| Sheffield | South Yorkshire | Esteli | Nicaragua |
| Shepshed | Leicestershire | Domont | France |
| Shepton Mallet | Somerset | Oissel | France |
| Shepton Mallet | Somerset | Bollnas | Sweden |
| Shepton Mallet | Somerset | Hannover - Misburg Anderten | Germany |
| Sherborne | Dorset | Altea | Spain |
| Sherborne | Dorset | Bellagio | Italy |
| Sherborne | Dorset | Bundoran | Republic of Ireland |
| Sherborne | Dorset | Chojna | Poland |
| Sherborne | Dorset | Granville | France |
| Sherborne | Dorset | Holstebro | Denmark |
| Sherborne | Dorset | Houffalize | Belgium |
| Sherborne | Dorset | Kotzting | Germany |
| Sherborne | Dorset | Meerssen | Netherlands |
| Sherborne | Dorset | Niederanven | Luxembourg |
| Sherborne | Dorset | Preveza | Greece |
| Sherborne | Dorset | San Gimignano | Italy |
| Sherborne | Dorset | Sesimbra | Portugal |
| Sherfield-On-Loddon | Hampshire | Euskirchen - Dom Esch | Germany |
| Sheringham | Norfolk | Otterndorf | Germany |
| Sherington | Buckinghamshire | Sameon | France |
| Shetland | Shetland | Vagsoy | Norway |
| Shifnal | Shropshire | Machecoul | France |
| Shilbottle | Northumberland | Hery | France |
| Shipdham | Norfolk | Noyant-La-Gravoyere | France |
| Shipley | West Yorkshire | Hamm | Germany |
| Shipston-On-Stour | Warwickshire | Torigni-Sur-Vire | France |
| Shirebrook | Nottinghamshire | Decazeville | France |
| Shrewsbury | Shropshire | Zutphen | Netherlands |
| Shrivenham | Oxfordshire | Mortree | France |
| Shropshire County | Shropshire | Nord Baden | Germany |
| Sible Hedingham | Essex | Choisy-Au-Bac | France |
| Sidmouth | Devon | Le Locle | Switzerland |
| Silkstone | South Yorkshire | St-Florent-Des-Bois | France |
| Silverton | Devon | Plogastel-St-Germain | France |
| Sittingbourne & Milton | Kent | Ypres (Ieper) | Belgium |
| Skegness | Lincolnshire | Bad Gandersheim | Germany |
| Skipton | North Yorkshire | Simbach Am Inn | Germany |
| Skye & Lochalsh | Highland | Maclean | Australia |
| Skye & Lochalsh | Highland | Port Hawkesbury | Canada |
| Slaugham | West Sussex | St-Martin-Des-Besaces | France |
| Slimbridge | Gloucestershire | St Georges Du Vievre | France |
| Slough | Berkshire | Montreuil | France |
| Snodland | Kent | Moyeuvre-Grande | France |
| Sodbury | South Gloucestershire | Cesson | France |
| Solihull | West Midlands | Cholet | France |
| Solihull | West Midlands | Main-Taunus Lk. | Germany |
| Somerset County | Somerset | Mufulira Municipal Council | Zambia |
| Somerset County | Somerset | Orne | France |
| Somerton | Somerset | Licciana Nardi | Italy |
| Somerton | Somerset | Sille-Le-Guillaume | France |
| Sonning | Berkshire | Liguge | France |
| South Brent | Devon | Chateauneuf-Du-Faou | France |
| South Derbyshire | Derbyshire | Druskininkai | Lithuania |
| South Derbyshire | Derbyshire | Skovde | Sweden |
| South Elmsall | West Yorkshire | Wetter/Hess. | Germany |
| South Holland | Lincolnshire | Sezanne | France |
| South Holland | Lincolnshire | Speyer | Germany |
| South Kesteven | Lincolnshire | Przemysl | Poland |
| South Kirby & Moorthorpe | West Yorkshire | Lodeve | France |
| South Kirby & Moorthorpe | West Yorkshire | Sprockhovel | Germany |
| South Molton | Devon | Livarot | France |
| South Ribble | Lancashire | Schleswig-Flensburg Lk. | Germany |
| South Tyneside | Tyne & Wear | Epinay-Sur-Seine | France |
| South Tyneside | Tyne & Wear | Noisy-Le-Sec | France |
| South Tyneside | Tyne & Wear | Sandefjord | Norway |
| South Tyneside | Tyne & Wear | Wuppertal | Germany |
| South Wonston | Hampshire | La Frenaye | France |
| South Yorkshire County | South Yorkshire | Pittsburgh | USA |
| South Yorkshire County | South Yorkshire | Liaoning Province | China |
| South Yorkshire County | South Yorkshire | Westphalia-Lippe | Germany |
| Southam | Warwickshire | Marolles-En-Hurepoix | France |
| Southampton | Hampshire | Qingdao | China |
| Southampton | Hampshire | Le Havre | France |
| Southampton | Hampshire | Rems Murr Lk. | Germany |
| Southborough | Kent | Lambersart | France |
| Southborough | Kent | Southborough | USA |
| Southend-On-Sea | Southend-On-Sea | Sopot | Poland |
| Southwark | London | Clichy | France |
| Southwark | London | Langenhagen/Hann. | Germany |
| Southwell | Nottinghamshire | Cesky Brod | Czech Republic |
| Southwell | Nottinghamshire | Sees | France |
| Speldhurst | Kent | Marchiennes | France |
| Spelthorne | Surrey | Melun | France |
| Spetisbury | Dorset | Le Vast | France |
| Speyside | Moray | Touques | France |
| Spilsby | Lincolnshire | Fresay-Sur-Sarthe | France |
| St Albans | Hertfordshire | Fano | Italy |
| St Albans | Hertfordshire | Nevers | France |
| St Albans | Hertfordshire | Nieuwleussen | Netherlands |
| St Albans | Hertfordshire | Nyiregyhaza | Hungary |
| St Albans | Hertfordshire | Odense | Denmark |
| St Albans | Hertfordshire | Worms | Germany |
| St Asaph | Denbighshire | Begard | France |
| St Buryan | Cornwall | Calan | France |
| St Clears | Carmarthenshire | Peillac | France |
| St David's | Pembrokeshire | Naas | Republic of Ireland |
| St Erth | Cornwall | Ploulec'h | France |
| St Gennys | Cornwall | Saint-Ouen-des-Alleux | France |
| St Germans | Cornwall | Plouguerneau | France |
| St Helens | Merseyside | Chalon-Sur-Saone | France |
| St Helens | Merseyside | Stuttgart | Germany |
| St Helens | Merseyside | Vyborg | Russia |
| St Ives | Cambridgeshire | Stadtallendorf | Germany |
| St Ives | Cornwall | Camaret-Sur-Mer | France |
| St Neot | Cornwall | Malguenac | France |
| St Neots | Cambridgeshire | Faches-Thumesnil | France |
| St Stithians | Cornwall | Ploerdut | France |
| Stafford | Staffordshire | Belfort | France |
| Stafford | Staffordshire | La Roe | France |
| Stafford | Staffordshire | Dreieich | Germany |
| Stafford | Staffordshire | Stafford County | USA |
| Stafford | Staffordshire | Tarragona | Spain |
| Staffordshire County | Staffordshire | Ivanovo | Russia |
| Stalybridge | Greater Manchester | Armentieres | France |
| Stamford | Lincolnshire | Kutna Hora | Czech Republic |
| Stamford | Lincolnshire | Vence | France |
| Stanford In The Vale | Oxfordshire | St-Germain-Du-Corbeis | France |
| Stanwix | Cumbria | Koln-Delbruck | Germany |
| Stapleford | Cambridgeshire | Nachingwea | Tanzania |
| Stapleford | Cambridgeshire | Villedomer | France |
| Starcross | Devon | Henvic | France |
| Stepps | Glasgow | Les Marches | France |
| Stevenage | Hertfordshire | Autun | France |
| Stevenage | Hertfordshire | Chimkent | Kazakhstan |
| Stevenage | Hertfordshire | Ingelheim Am Rhein | Germany |
| Stevenage | Hertfordshire | Kadoma | Zimbabwe |
| Stilton | Cambridgeshire | St Christol Les Ales | France |
| Stirling | Stirling | Dunedin | USA |
| Stirling | Stirling | Forchheim/Oberfr. | Germany |
| Stirling | Stirling | Villeneuve-D'Ascq | France |
| Stirling | Stirling | Weissenfels | Germany |
| Stockport | Greater Manchester | Beziers | France |
| Stockport | Greater Manchester | Heilbronn | Germany |
| Stocksmoor | West Yorkshire | Olgiate Molgora | Italy |
| Stogursey | Somerset | Lonlay-L'Abbaye | France |
| Stoke Canon | Devon | Bavent | France |
| Stoke-On-Trent | Staffordshire | Erlangen | Germany |
| Stokeinteignhead | Devon | Trevieres | France |
| Storrington | West Sussex | Villerest | France |
| Stourport-On-Severn | Worcestershire | Villeneuve-Le-Roi | France |
| Stowmarket | Suffolk | Verneuil-Sur-Avre | France |
| Strabane | Co Tyrone | Gotze Delchev | Bulgaria |
| Strabane | Co Tyrone | Messancy | Belgium |
| Strabane | Co Tyrone | Sioux Falls | USA |
| Strabane | Co Tyrone | Zeulenroda Lk. | Germany |
| Stratford-Upon-Avon | Warwickshire | Stratford | USA |
| Stratford-Upon-Avon | Warwickshire | Stratford | Canada |
| Stratford-Upon-Avon | Warwickshire | Stratford | Canada |
| Stratford-Upon-Avon | Warwickshire | Stratford | New Zealand |
| Stratford-Upon-Avon | Warwickshire | Stratford | Australia |
| Street | Somerset | Isny im Allgau | Germany |
| Street | Somerset | Notre-Dame-De-Gravenchon | France |
| Stroud | Gloucestershire | Duderstadt (Gottingen) | Germany |
| Stroud | Gloucestershire | Stroud | USA |
| Studley | Warwickshire | Aillant-Sur-Tholon | France |
| Sturminster Marshall | Dorset | Ste-Mere-Eglise | France |
| Sturminster Newton | Dorset | Montebourg | France |
| Sturry And Fordwich | Kent | Aire-Sur-La-Lys | France |
| Sudbury | Suffolk | Clermont | France |
| Sudbury | Suffolk | Hoxter | Germany |
| Suffolk County | Suffolk | Suffolk | USA |
| Sunderland | Tyne & Wear | Essen/Ruhr | Germany |
| Sunderland | Tyne & Wear | St-Nazaire | France |
| Surrey Heath | Surrey | Bietigheim-Bissingen | Germany |
| Surrey Heath | Surrey | Sucy-En-Brie | France |
| Sutherland | Highland | Zetel | Germany |
| Sutton | London | Hammanskraal | South Africa |
| Sutton | London | Berlin-Wilmersdorf | Germany |
| Sutton | London | Gagny | France |
| Sutton | London | Gladsaxe | Denmark |
| Sutton | London | Minden/Westf. | Germany |
| Swaffham | Norfolk | Couhe | France |
| Swaffham | Norfolk | Hemmoor-Warstade | Germany |
| Swainswick | Bath And North East Somerset | Cressy-Sur-Somme | France |
| Swale | Kent | Gustrow Lk. | Germany |
| Swanage | Dorset | Rudesheim Am Rhein | Germany |
| Swanland | East Yorkshire | Lestrem | France |
| Swanley | Kent | Verrieres-Le-Buisson | France |
| Swanmore | Hampshire | Maneglise | France |
| Swanscombe & Greenhithe | Kent | Blankenberge | Belgium |
| Swansea | Swansea | Arhus Amter | Denmark |
| Swansea | Swansea | Cork | Ireland |
| Swansea | Swansea | Ferrara | Italy |
| Swansea | Swansea | Mannheim | Germany |
| Swansea | Swansea | Pau | France |
| Sway | Hampshire | Bretteville-sur-Ay | France |
| Swimbridge | Devon | Ste-Honorine-Du-Fay | France |
| Swindon | Wiltshire | Ocotal | Nicaragua |
| Swindon | Wiltshire | Salzgitter | Germany |
| Swineshead | Lincolnshire | La Milesse | France |
| Swingfield | Kent | Aviron | France |
| Syston | Leicestershire | Deville-Les-Rouen | France |
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