Encyclopedias, Almanacs, Transcripts, and Maps
- Ridgefield, Connecticut
- Ridgway, Rozanne Lejeanne
- Riedesel, Baron Friedrich Adolphus
- Riefenstahl, Leni (1902–2003)
- Rier, Carl P.
- Riflemen
- Rifles
- Right Opposition
- Rights in the Military, Citizens’
- Riis, Jacob
- Rimsky-Korsakov, Nikolai
- Rimsky-Korsakov, Nikolai Andreyevich
- Ringgold Wilmer Lardner
- Ringgold, Faith
- Rio Pact
- Riots
- Riots and Popular Protests
- Riots in France
- Ripple Effect
- Rise and Fall of the Ottoman Empire (Fourteenth to Seventeenth Centuries)