- Tachinidae Recording Scheme
- Tallinn Children's Hospital [Tallinn, Estonia]
- Tallinn University
- Tallinn University of Technology
- Tanzanian Organic Agriculture Movement
- T. A. Pai Management Institute
- Tarbiat Modares University [Tehran]
- Tauari
- Taylor’s University
- Teagasc Agriculture and Food Development Authority
- Teagasc - The Agriculture and Food Development Authority
- Team of Environmental Epidemiology Applied to Development and Respiratory Health, Institute for Advanced Biosciences, Université Grenoble Alpes, INSERM, CNRS, La Tronche
- Technical University of Berlin | Technische Universität Berlin
- Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig]
- Technische Universität Dresden = Dresden University of Technology
- Technische Universität Munchen - Technical University Munich - Université Technique de Munich
- Technological Education Institute of Lamia
- Technopôle de l’Aube en Champagne
- Technopolis Group
- Tecnológico de Monterrey = Monterrey Institute of Technology
- Télécom Bretagne
- Télécom ParisTech
- Tembotov Institute of Ecology of Mountain Territories, Russian Academy of Sciences
- Temple University
- Temple University [Philadelphia]
- Terre de Liens [Association]
- Terres Inovia
- Tête de Réseaux pour l’Appui Méthodologique aux Entreprises
- Texas A&M University [College Station]
- The Arctic University of Norway [Tromsø, Norway]
- The Chemours Company
- the Climate Data Factory
- The Education University of Hong Kong
- The EMGO Institute for Health and Care Research
- The First Affiliated Hospital of Guangzhou Medical University
- The George Washington University
- The Green Factory
- The Hebrew University of Jerusalem
- The Indigenous Partnership for Agrobiodiversity and Food Sovereignty
- The Institute for Structural Research
- The James Hutton Institute
- , The Mindich Child Health & Development Institute
- The Morton Arboretum
- The Nature Conservancy
- The Netherlands Cancer Institute
- The Netherlands Organisation for Applied Scientific Research
- The Norwegian Forest and Landscape Institute
- The Pirbright Institute
- The Research Council of Norway
- The Riddet Institute, Massey University,
- The Roslin Institute
- The Royal Swedish Academy of Sciences
- The Samuel Roberts Noble Foundation
- The Scripps Research Institute [La Jolla, San Diego]
- The University of Hong Kong
- The University of Jordan
- The University of Mississippi [Oxford]
- The University of Queensland
- The University of Sydney
- The University of the West Indies
- The University of Tokyo
- The University of Western Australia
- The Wellcome Trust Sanger Institute [Cambridge]
- Thuenen-Institute of Biodiversity
- Thuenen Institute of Farm Economics
- Thuenen-Institute of Organic Farming
- Thünen Institute
- Thuringian State Institute of Agriculture
- Tilburg University [Netherlands]
- Tnalak Tau Sebu
- Tochigi Prefectural Museum
- Tomsk State University [Tomsk]
- Total Energies
- TOTAL FINA ELF
- Total Raffinage-Chimie
- TOTAL SA
- Tour du Valat, Research Institute for the conservation of Mediterranean Wetlands
- TOXEM
- Tridilogy SARL, Saint-Gély du Fesc
- Trier University
- Trier University of Applied Sciences
- Trinity College Dublin
- Trophis
- Tufts University [Medford]
- Tuque Rouge
- Turku University Hospital
- Twistaroma