Encyclopedias, Almanacs, Transcripts, and Maps
- Russell, John, 1st Earl
- Russell, Ken
- Russian Five
- Russian Revolution of 1905
- Ruth and Naomi
- Ruth, ‘Babe’
- Rutherford, Ernest, Lord
- Ruthven's Frogs (Allophrynidae)
- Ruusbroec, Jan van
- Ryder Cup
- Ryle, Sir Martin
- Sabazios
- sabre-toothed tiger
- Sac-Winged Bats, Sheath-Tailed Bats, and Ghost Bats (Emballonuridae)
- saccharide
- Saccopharyngiformes (Swallowers and Gulpers)
- Sacrament: An Overview
- Sacrament: Christian Sacraments
- Sacred and the Profane, The
- Sacred Space