R
- Sarah A. Radcliffe
- Friedrich Ratzel
- Amin Razi (Persia, 16th century)
- Elisee Reclus
- Piri Reis (Turkey, 1465–1554)
- James Rennell
- Orlando Ribeiro
- Ferdinand Baron Von Richthofen 19th Century
- Carl Ritter (Germany, 1779–1859)
- Arthur H. Robinson
- Joseph Rock
- Friedrich Gerhard Rohlfs
- Bernard Romans
- Thomas E. Ross
- William Roy
- Ibn Rushd (Averroes) (Islamic Spain, 1126–1198)
- Ibn Rustah (Persia, d. 903)
Read more about this topic: List Of Geographers