Twin Towns in the UK
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| UK town | UK region | Overseas town/region | Overseas country |
| Radcliffe-On-Trent | Nottinghamshire | Bussy-Saint-Georges | France |
| Radlett | Hertfordshire | Vriezenveen | Netherlands |
| Radlett & Aldenham | Hertfordshire | Lautertal/Odenwald | Germany |
| Radlett & Aldenham | Hertfordshire | Louveciennes | France |
| Radnage | Buckinghamshire | Radenac | France |
| Radyr & Morganstown | Cardiff | St-Philbert-De-Grand-Lieu | France |
| Rainford | Merseyside | Verneuil-Sur-Seine | France |
| Ramsey | Isle Of Man | St-Brevin-Les-Pins | France |
| Ramsgate | Kent | Conflans-Ste-Honorine | France |
| Ramsgate | Kent | Frederikssund | Denmark |
| Raunds | Northamptonshire | Kamp Bornhofen | Germany |
| Rayne | Essex | Verberie | France |
| Reading | Berkshire | Clonmel | Ireland |
| Reading | Berkshire | Dusseldorf | Germany |
| Reading | Berkshire | Meaux | France |
| Reading | Berkshire | San Francisco Libre | Nicaragua |
| Redbridge | London | Haute Normandie | France |
| Redcar and Cleveland | Redcar and Cleveland | Troisdorf | Germany |
| Redditch | Worcestershire | St Elizabeth | Jamaica |
| Redditch | Worcestershire | Auxerre | France |
| Redditch | Worcestershire | Mtwara | Tanzania |
| Redditch | Worcestershire | Gruchet-le-Valasse | France |
| Redgrave Botesdale Rickinghall | Suffolk | Tinteniac | France |
| Redruth | Cornwall | Plumergat | France |
| Reigate & Banstead | Surrey | Brunoy | France |
| Reigate & Banstead | Surrey | Eschweiler | Germany |
| Renfrewshire | Renfrewshire | Furth/Bay. | Germany |
| Renfrewshire | Renfrewshire | Gladsaxe | Denmark |
| Restormel | Cornwall | Dithmarschen Lk. | Germany |
| Retford | Nottinghamshire | Pfungstadt | Germany |
| Rettendon | Essex | Torcy-Le-Petit | France |
| Rhondda Cynon Taff | Rhondda Cynon Taff | Nurtingen | Germany |
| Rhondda Cynon Taff | Rhondda Cynon Taff | Ravensburg | Germany |
| Rhondda Cynon Taff | Rhondda Cynon Taff | Wolfenbuttel Lk. | Germany |
| Rhosyr and Aberffraw Anglesey | Wales | Mortagne-Sur-Gironde | France |
| Richmond | North Yorkshire | Nord-Fron | Norway |
| Richmond-Upon-Thames | London | Fontainebleau | France |
| Richmond-Upon-Thames | London | Konstanz | Germany |
| Richmond-Upon-Thames | London | Richmond | USA |
| Ringwood | Hampshire | Pont-Audemer | France |
| Ringwould With Kingsdown | Kent | Wissant | France |
| Ripley | Derbyshire | Lons-Le-Saunier | France |
| Ripon | North Yorkshire | Foix | France |
| Robertsbridge | East Sussex | St Brice Courcelles | France |
| Rochdale | Greater Manchester | Bielefeld | Germany |
| Rochdale | Greater Manchester | Lviv | Ukraine |
| Rochdale | Greater Manchester | Sahiwal | Pakistan |
| Rochdale | Greater Manchester | Tourcoing | France |
| Rochester | Kent | Cadiz | Spain |
| Rochford | Essex | Haltern | Germany |
| Roding Valley | Essex | Mantes-La-Jolie | France |
| Romsey | Hampshire | Battenberg/Eder | Germany |
| Romsey | Hampshire | Paimpol | France |
| Ross-On-Wye | Herefordshire | Betzdorf | Germany |
| Ross-On-Wye | Herefordshire | Conde-Sur-Noireau | France |
| Rossendale | Lancashire | Bocholt | Germany |
| Rotherfield | East Sussex | St-Cheron | France |
| Rotherham | South Yorkshire | St-Quentin | France |
| Rothwell | Northamptonshire | Droue | France |
| Royston | Hertfordshire | Grossalmerode | Germany |
| Royston | Hertfordshire | La Loupe | France |
| Ruddington | Nottinghamshire | Grenay | France |
| Rugby | Warwickshire | Evreux | France |
| Rugby | Warwickshire | Russelsheim | Germany |
| Rugeley | Staffordshire | Western Springs | USA |
| Runnymede | Surrey | Bergisch-Glattbach-Bensburg | Germany |
| Runnymede | Surrey | Herndon | USA |
| Runnymede | Surrey | Joinville-Le-Pont | France |
| Rushden | Northamptonshire | Lorelie-Gebiet | Germany |
| Rushmoor | Hampshire | Sulechow | Poland |
| Rushmoor | Hampshire | Meudon | France |
| Rushmoor | Hampshire | Oberursel | Germany |
| Rustington | West Sussex | Los Altos | USA |
| Rustington | West Sussex | Kunzell | Germany |
| Ruthin | Denbighshire | Briec de l'Odet | France |
| Ryton On Dunsmore | West Midlands | Hordain | France |
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