- Jacobs University = Constructor University [Bremen]
- JADBio Gnosis DA S.A., Science and Technology Park of Crete, Heraklion,
- James Cook University
- Japan Agency for Marine-Earth Science and Technology
- Japan Atomic Energy Agency
- Japanese Society for the Promotion of Science Fellow
- Japan Science and Technology Agency
- Jaume I University
- J. Craig Venter Institute [La Jolla, USA]
- Jealott's Hill International Research Centre
- Jefferson (Philadelphia University + Thomas Jefferson University)
- Jena University Hospital [Jena]
- Jeonbuk National University
- Jet Propulsion Laboratory
- JET PROPULSION LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY PASADENA USA
- JET PROPULSION LABORATORY PASADENA USA
- Jewish General Hospital
- Jiangnan University
- Jiangxi Agricultural University
- Jiangxi University of Finance and Economics
- Jilin Normal University
- JOANNEUM REEARCH FORSCHUNGSGESELLSCHAFT MBH AUS
- Joanneum Research Forschungsgesellschaft mbH
- Joensuu Unit
- Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University
- Johann Heinrich von Thünen-Institut = Thünen Institute
- Johann Radon Institute for Computational and Applied Mathematics
- John Curtin School of Medical Research [Canberra, Australia]
- John Innes Centre [Norwich]
- Johns Hopkins Bloomberg School of Public Health [Baltimore]
- Johns Hopkins University
- Joint BioEnergy Institute [Emeryville]
- Joint Nature Conservation Committee
- JOINT RESEARCH CENTER EUROPEAN COMMISSION
- Joint Research Center Institute for the Protection and Security of the Citizen
- Joint Research Center, Ispra, Italy
- JOINT RESEARCH CENTER ITA
- Joint Research Centre of the European Commission
- Joseph Louis LAGRANGE
- Jouve - Mayenne
- Jozef Stefan Institute [Ljubljana]
- JRC Institute for Environment and Sustainability
- JRC Institute for Prospective Technological Studies
- JRC Institute for Transuranium Elements [Karlsruhe]
- JST-CREST
- Julius Center for Health Sciences and Primary Care
- Julius Kühn-Institut
- Julius Kühn-Institut - Federal Research Centre for Cultivated Plants
- Julius-Maximilians-Universität Würzburg = University of Würzburg
- JUNIA
- Justus-Liebig-Universität Gießen = Justus Liebig University