- Jack Baskin School of Engineering
- Jacobs University = Constructor University [Bremen]
- Jadavpur University
- Jade University of Applied Sciences
- Jagiellonian Univerity
- Jagiello'nski
- James Cook University
- James Madison University
- James Watt School of Engineering [Univ Glasgow]
- Jamia Milia Islamia University [New Delhi]
- Jan de Boer
- Janelia Research Campus [Ashburn]
- Japan Advanced Institute of Science and Technology
- Japan Aerospace Exploration Agency [Sagamihara]
- Japan Aerospace Exploration Agency [Tokyo]
- Japan Aerospace Exploration Agency [Tsukuba]
- Japan Agency for Marine-Earth Science and Technology
- Japan Atomic Energy Agency
- Japan Atomic Energy Agency [Ibaraki]
- Japanese French Laboratory for Informatics
- Japan Fine Ceramics Center
- Japan Meteorological Agency
- Japan Science and Technology Agency
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Jawaharlal Nehru Technological University, Hyderabad 500085, India
- Jawaharlal Nehru University
- Jawahar Master Department of Computer Science and Information System, University of Rajasthan
- Jaypee Hospital
- Jaypee University of Information Technology
- Jazan University
- JCC Consulting Inc
- J. Craig Venter Institute
- JDA Software
- JDSU Uniphase
- Jealott’s Hill International Research Centre
- Jeju National University
- Jeonbuk National University
- Jerusalem College of Technology
- Jet Propulsion Laboratory
- JEUMONT Electric
- Jeune équipe Anthropologie urbaine
- Jeunes Équipes de l'Institut de Physique du Collège de France
- J. Heyrovsky institute of Physical Chemistry
- J. Heyrovsky Institute of Physical Chemistry
- Jiangnan University
- JiangNan University
- Jiangsu Academy of Agricultural Sciences
- Jiangsu Maritime Institute
- Jiangsu Normal University
- JiangSu University
- Jiangxi Agricultural University
- Jiangxi Normal University
- Jilin Normal University
- Jilin University
- Jinan University
- JiNan University
- Jinan University [Guangzhou]
- JK Consulting & Projects
- Jodrell Bank Centre for Astrophysics
- Johann Bernoulli Institute for Mathematics, Computer Science, and Artificial Intelligence
- Johann Bernoulli Institute of Mathematics and Computing Science
- Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University
- Johannes Kepler Universität
- Johannes Kepler University
- Johann Radon Institute for Computational and Applied Mathematics
- John and Willie Leone Family Department of Energy and Mineral Engineering
- John Curtin School of Medical Research [Canberra, Australia]
- John Deere Technology & Innovation Center
- John Hunter Children's Hospital
- 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 [Baltimore]
- Johnson Controls Automotive Electronics
- Johnson Controls Automotive Electronics - Electronics Division Europe
- John von Neumann Institute VNU-HCM
- Joint BSC-CRG-IRB Research Program in Computational Biology
- Joint European Torus
- Joint FAO|IAEA Programme - Nuclear Techniques in Food and Agriculture
- Joint Institute for Laboratory Astrophysics
- Joint Institute for Nuclear Research
- Joint Japanese-French Robotics Research Laboratory [Japon]
- Joint Laboratory for Petascale Computing [Illinois]
- Joint Program on the Science and Policy of Global Change
- Joint Research Center of Applied Mathematics for ATM
- Joint Robotics Laboratory
- Joseph Louis LAGRANGE
- Joseph Sarwuan Tarka University, Makurdi, Nigeria
- Josip Juraj Strossmayer University of Osijek
- Journaliste
- Jozef Stefan Institute [Ljubljana]
- Jozef Stefan International Postgraduate School [Ljubljana, Slovenia]
- JRC Institute for Environment and Sustainability
- JRC Institute for Reference Materials and Measurements [Geel]
- JRC Institute for the Protection and Security of the Citizen [Ispra]
- JSC Freight One [Moscou]
- JTEKT
- Juelich GmbH
- Jülich Aachen Research Alliance (JARA)
- Jülich Research Centre
- Jülich Supercomputing Center
- Jülich Supercomputing Centre
- Julius Center for Health Sciences and Primary Care
- Julius Kühn-Institut
- Julius-Maximilians-Universität Würzburg = University of Würzburg
- Julius-Maximilians-Universität Würzburg - University of Wurzburg [Würsburg, Germany]
- JUNIA
- Juniorprofessur Agentenbasierte Automatisierung
- Just One Giant Lab
- Justus-Liebig-Universität Gießen = Justus Liebig University