- La Jolla Institute for Allergy and Immunology
- La Jolla Institute for Immunology
- La Trobe University
- Laboratory for Molecular Infection Medicine Sweden
- Lancaster University
- Lancet
- Landes Bioscience
- Lappeenranta University of Technology
- Las Cumbres Observatory
- Las Cumbres Observatory Global Telescope Network
- Latrobe University
- Laval University
- Lawrence Berkeley National Laboratory
- Lawrence Livermore National Laboratory
- Lawrence Technological University
- Lawson Health Research Institute
- Leeds Beckett University
- Leeds Teaching Hospitals NHS Trust
- Lehigh University
- Leibniz Institute for Astrophysics Potsdam
- Leibniz Institute for Interactive Materials
- Leibniz Institute for New Materials
- Leiden Institute of Physics
- Leiden University
- Leipzig University
- Lewis & Clark College
- Lifespan
- Linguistic Society of America
- Linköping University
- Linnaeus University
- Liverpool Hope University
- Liverpool John Moores University
- Liverpool School of Tropical Medicine
- Lobachevsky University
- Lock Haven University
- Lockheed Martin
- Lomonosov Moscow State University
- London Centre for Nanotechnology
- London School of Economics
- London School of Hygiene & Tropical Medicine
- Los Alamos National Laboratory
- Los Angeles Biomedical Research Institute at Harbor
- Loughborough University
- Louisiana State University
- Louisiana Tech University
- Lowell Observatory
- Loyola University Health System
- Ludwig Cancer Research
- Ludwig Institute for Cancer Research
- Ludwig Maximilian University of Munich
- Lulea University of Technology
- Lund University
- Lunenfeld-Tanenbaum Research Institute
