- Wallis and Futuna, Territory of the Wallis and Futuna Islands
- WEF
- see World Economic Forum (1970 - ) - Western Samoa
- see Samoa, Independent State of Samoa - WFP
- see World Food Programme (1963 - ), United Nations - WHO
- see Regional Office for South-East Asia (1948 - ), World Health Organization - WHO
- see Regional Office for the Western Pacific (1948 - ), World Health Organization - WHO
- see World Health Organization (1948 - ), United Nations - Women and HIV
- see Microbicides - Women and HIV/AIDS
- see Gender and HIV/AIDS - Women, Children, and HIV
- World Bank (1944 - ), United Nations
- The World Bank Group
- see World Bank (1944 - ), United Nations - World Economic Forum (1970 - )
- World Food Programme (1963 - ), United Nations
- World Health Organization (1948 - ), United Nations
- World Health Organization, Regional Office for South-East Asia (1948 - )
- World Health Organization, Regional Office for the Western Pacific (1948 - )
- World of Work
- see HIV in the workplace/World of work - World Trade Organization
- World Vision (1950 - )
- WPRO
- see Regional Office for the Western Pacific (1948 - ), World Health Organization - WTO
- see World Trade Organization