U.S. History
- Railroad Retirement Act
- Real estate industry
- Reconstruction
- Reform Judaism
- Relations with Cuba
- Relations with Great Britain
- Relations with Iran
- Relations with Israel
- Relations with Korea
- Relations with Nicaragua
- Relations with Vietnam
- Relations with Yugoslavia
- Religion in the New World
- Resumption Act of 1875
- Retail
- RICO
- rights
- Riots
- Roaring Twenties
- Robber barons