Encyclopedias, Almanacs, Transcripts, and Maps
- Ray, James Earl
- Raye, Martha
- Rayón, Ignacio (1773–1832)
- Raʾs al-Khayma
- Read, Mary (late 1600s–c. 1720)
- Reagan Plan (1982)
- Reagan, Ronald Wilson
- Reagan, Ronald Wilson
- Real Alto
- Real Consulado de Caracas
- Real Cuerpo de Minería
- Real de Azúa, Carlos (1916–1977)
- Real Hacienda
- Reale, Miguel (1910–)
- Realism and Naturalism, Mathematical
- Reasoner, Harry
- Rebelión de San Martín Texmelucan, Puebla 1879
- Rebelión Sierra Gorda
- Rebouças, André (1838–1898)
- Recabarren Serrano, Luis Emilio (1876–1924)