| Code | Name | Region |
|---|---|---|
| GBRTW | Royal Tunbridge Wells | KEN |
| GBROB | Roybridge | HLD |
| GBZCT | Roydon | ESS |
| GBZCU | Royston | BNS |
| GBROS | Royston | HRT |
| GBRTN | Royton | OLD |
| GBRLY | Ropley | HAM |
| GBRTY | Rosehearty | ABD |
| GBRME | Rosemarkie | HLD |
| GBRWL | Rosewell | MLN |
| GBROI | Roslin | MLN |
| GBRSH | Rosneath | AGB |
| GBRSS | Ross | DGY |
| GBRDA | Rossendale | LAN |
| GBRTT | Rossett | WRX |
| GBRSD | Rossington | DNC |
| GBRLA | Rosslea | FER |
| GBRNW | Ross-on-wye | HEF |
| GBRTE | Rostherne | CHE |
| GBROR | Rostrevor | DOW |
| GBRTV | Rostrevor | NYM |
| GBROY | Rosyth | FIF |
| GBRTR | Rotherfield | ESX |
| GBRTH | Rotherham | ROT |
| GBRRW | Rotherwas | |
| GBROT | Rothes | MRY |
| GBROA | Roade | NTH |
| GBRBR | Robertsbridge | ESX |
| GBRBO | Roberttown | ERY |
| GBRBB | Robin Hoods Bay | NYK |
| GBRBH | Roborough | DEV |
| GBRCR | Rocester | STS |
| GBROL | Rochdale | RCH |
| GBROH | Roche | CON |
| GBRCS | Rochester | KEN |
| GBRFD | Rochford | ESS |
| GBROC | Rock | CON |
| GBRFR | Rock Ferry | WRL |
| GBROK | Rockcliffe | CMA |
| GBRFF | Roecliffe | NYK |
| GBROG | Rogerstone | NWP |
| GBRLD | Rolvenden | KEN |
| GBRMF | Romford | HAV |
| GBROM | Romney Marsh | KEN |
| GBRMS | Romsey | HAM |
| GBRKB | Rooks Bridge | SOM |
| GBRID | Ridham Dock | KEN |
| GBRGM | Riding Mill | NBL |
| GBRGR | Ringmer | ESX |
| GBRIN | Ringstead | NFK |