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- Rajasthan
- Rajpipla
- Ras Al-Khaima
- Reunion
- Rhodesia & Nyasaland
- Rhodesia
- Riau-Lingga Archipelago
- Rio Muni
- Roman States
- Ros Dependency
- Roussai Island (Awdar)
- Rwanda-Urundi
- Rumania
- Romanian Occupation of Hungary
- Romanian Post Offices in the Turkish Empire
- Russia
- Russian Post Offices in China
- Russian Post Offices in Crete
- Russian Post Offices in Turkish Empire
- Rwanda
- Ryukyu Islands
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