- W. K. Kellogg Biological Station
- W.M. Keck Observatory
- WATT & WELL S.A.S., 91300 Massy, France
- WISEBATT
- WPD Offshore
- Wageningen University and Research [Wageningen]
- Wakayama University
- Wake Forest University
- Wales Institute of Social and Economic Research, Data and Methods
- Wallenberg Centre for Molecular Medicine (WCMM)
- Warsaw University of Technology [Warsaw]
- Warwick Manufacturing Group [Coventry]
- Warwick Medical School
- Waseda University [Tokyo, Japan]
- Washington State University
- Washington University
- Washington University in Saint Louis
- Water Problems Institute
- Water Resource Systems Research Laboratory
- Waterford Institute of Technology
- Wave Interaction and Propagation Section, European Space Agency, Keplerlaan 1, NL-2200 AG Noordwijk, Netherlands
- Web-Instrumented Man-Machine Interactions, Communities and Semantics
- Wehrwissenschaftliches Institut für Werk- und Betriebsstoffe, Erding
- Weierstraß-Institut für Angewandte Analysis und Stochastik = Weierstrass Institute for Applied Analysis and Stochastics [Berlin]
- Weill Medical College of Cornell University [New York]
- Weizmann Institute of Science [Rehovot, Israël]
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences,
- Wellesley College
- Wesleyan University
- West Bohemia University
- West Tehran Islamic Azad University [Tehran]
- West Virginia University [Morgantown]
- Western Michigan University [Kalamazoo]
- Westfälische Wilhelms-Universität Münster = University of Münster
- Wheeling Jesuit University
- Wi6labs
- Wichita State University
- Wigner Research Centre for Physics [Budapest]
- Williams Hall
- Wireless Systems Group
- Witsee
- World Bank
- World Meteorological Organization
- Wroclaw University of Science and Technology
- Wuhan University [China]
- Wuhan University of Technology