Encyclopedias, Almanacs, Transcripts, and Maps
- Ross Dam
- Ross Island
- Ross Lake National Recreation Area
- Ross Sea
- Ross, Barney David
- Ross, George
- Ross, Robert
- Ross, Sir George William
- Rossbach
- Rossellino, Antonio
- Rosset, Barney Lee, Jr.
- Rossi, Pellegrino Luigi Edoardo, Conte
- Rosso di San Secondo, Piermaria
- Rostenkowski, Dan
- Rostopchin, Feodor Vasilyevich, Count
- Rostow, Eugene Victor Debs
- rotation of crops
- rotenone
- Roth, Alvin Elliot
- Roth, Cecil