- Jack Baskin School of Engineering
- Jackson School of Geosciences
- Jacobs University = Constructor University [Bremen]
- JADBio Gnosis DA S.A., Science and Technology Park of Crete, Heraklion,
- Janssen Infectious Diseases and Vaccines
- Janssen Pharmaceutica N.V. [Beerse, Belgium]
- Jan Yperman Hospital
- Jardín Botánico Nacional Dr. Rafael Ma. Moscoso
- Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER)
- Jaypee University of Information Technology
- J. Craig Venter Institute [La Jolla, USA]
- Jefferson (Philadelphia University + Thomas Jefferson University)
- Jena University Hospital [Jena]
- J. E. Purkinje University
- Jet Propulsion Laboratory
- Jiangnan University
- Jiangsu Academy of Agricultural Sciences
- Jiaxing University
- Jinan University [Guangzhou]
- John Innes Centre [Norwich]
- Johns Hopkins Bloomberg School of Public Health [Baltimore]
- Johns Hopkins University
- Johns Hopkins University School of Medicine [Baltimore]
- Joint Genome Institute (JGI)
- Joint Research Unit CTFC – AGROTECNIO, Solsona, Spain
- Józef Babinski Hospital
- Jozef Stefan Institute [Ljubljana]
- JRS, Les Tanneries Royales
- Jülich Supercomputing Centre
- Julius Kühn-Institut
- Julius Kühn-Institut - Federal Research Centre for Cultivated Plants
- Julius-Maximilians-Universität Würzburg
- JUNIA
- Justus-Liebig-Universität Gießen = Justus Liebig University