- JE2358
- JIFRESSE
- JOINT RESEARCH CENTER ITA
- JRC Institute for Environment and Sustainability
- JRC Institute for the Protection and Security of the Citizen [Ispra]
- JSI
- JST-ACCEL
- JUNIA
- Jacobs University [Bremen]
- Jagiellonian Centre for Experimental Therapeutics
- James Cook University
- Jan Dlugosz University in Czestochowa
- Jan Yperman Hospital
- Janssen Pharmaceutica [Beerse]
- Janssen-Cilag [Issy-les-Moulineaux]
- Japan Agency for Marine-Earth Science and Technology
- Japan Biological Informatics Consortium [Tokyo]
- Jardin botanique de Bordeaux
- Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER)
- Jawaharlal Nehru University
- Jean Marie Beauvais Consultants
- Jefferson (Philadelphia University + Thomas Jefferson University)
- Jena University Hospital [Jena]
- Jerry L. Pettis VA Medical Center
- Jerusalem College of Technology
- Jet Propulsion Laboratory
- Jeune Equipe Hémopathogènes Vectorisés
- Jeune équipe Anthropologie urbaine
- Jiangxi Agricultural University
- Jiangxi Normal University
- Jilin University
- Jinan University, Tripoli, Lebanon
- Jiujiang University [China]
- Jodrell Bank Centre for Astrophysics
- Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University
- Johannesburg University
- John H. Stroger, Jr. Hospital of Cook County
- John Innes Center
- John Innes Centre [Norwich]
- Johns Hopkins Bloomberg School of Public Health [Baltimore]
- Johns Hopkins University
- Johns Hopkins University Applied Physics Laboratory [Laurel, MD]
- Johns Hopkins University School of Medicine
- Johns Hopkins University School of Medicine [Baltimore]
- Johnson Matthey Technology Centre, Sonning Common, Reading RG4 9NH, United Kingdom
- Joint Centre for Applied Electron Microscopy
- Joint Institute for Nuclear Research
- Joint Institute for VLBI in Europe
- Joseph Louis LAGRANGE
- Jouf University (SAUDI ARABIA)
- Jouffray-Drillaud
- Jozef Stefan Institute [Ljubljana]
- Julius Kühn-Institut
- Julius Kühn-Institut - Federal Research Centre for Cultivated Plants
- Julius-Maximilians-Universität Würzburg
- Justus-Liebig-Universität Gießen = Justus Liebig University
- Jönköping University [Sweden]
- Jülich Supercomputing Centre