- RAF St. Pancras (London)1
- Regent's Park (London, England)1
- Reykjavik (Iceland)1
- Rhine1
- Rhode Island.2
- Richland County (S.C.)38
- Richmond4
- Richmond (Va.)1
- Richmond upon Thames (London, England)1
- Rio Grande1
- Riviera (France)1
- Roman3
- Rome (Italy)3
- Romford (London, England)1
- Romney Marsh (England)1
- Roughton Gill Mine, Cumberland, Cumbria, England, United Kingdom3
- Royal Air Force Mildenhall (England)1
- Royal Greenwich Observatory, London, England, United Kingdom3
- Russia5
- Saarbrücken (Germany)1