- Rathgen-Forschungslabor
- Real Expression Artificial Life
- Rent a Peasant
- Research Center
- Research Centre for The Humanities [Budapest]
- Research Institute of Cultural Heritage and Tourism (RICHT)
- Research Institute of Cultural Heritage and Tourism (RICHT), Iranian Center for Archaeological Research (ICAR), Tehran, Iran
- Research Institute of Wildlife Ecology
- Research Laboratory for Archaeology and the History of Art
- Research Laboratory for Archaeology and the History of Art [Oxford]
- Research School of Earth Sciences [ANU, Canberra]
- Réserve Géologique de Saucats
- Res. Inst. Wildlife Ecol.
- restauratrice indépendante
- Retraité
- Rheinische Friedrich-Wilhelms-Universität Bonn
- RiverLy - Fonctionnement des hydrosystèmes
- Rodents Grp
- Romanian Academy
- Romanian Academy of Sciences
- Romanian National History Museum
- Römisch-Germanische Kommission des Deutschen Archäologischen Instituts
- Römisch-Germanisches Zentralmuseum
- Rosenstiel School of Marine and Atmospheric Science
- Royal Belgian Insitute of Natural Sciences
- Royal Belgian Institue of Natural Sciences
- Royal Botanic Gardens [Kew]
- Royal Commission for AlUla
- Royal Holloway [University of London]
- Royal Veterinary College
- Ruhr University Bochum = Ruhr-Universität Bochum
- Ruppin Academic Centre
- Russian Academy of Science
- Russian Academy of Sciences [Moscow]
- Russian Federal Service for Hydrometeorology and Environmental Monitoring