| Abbreviation | Definition |
|---|---|
| WIOA | Wilderness Inquiry Outdoor Adventures |
| WIPA | Women for International Peace and Arbitration |
| WIPS | Western Interior Paleontological Society |
| WIRC | Wisconsin Information Resources Council |
| WIRES | Wildlife Information and REscue Service |
| WISN | Worldwide Indigenous Science Network |
| WIVA | Wisconsin Indian Veterans Association |
| WIWF | Wisconsin Wildlife Federation |
| WIWO | International Waderbird and Wetland Research Organization |
| WJBCJ | William J. Brennan Jr. Center for Justice |
| WJFB | World Job and Food Bank |
| WJH | Ward J. Herbert Fund |
| WJR | World Jewish Relief |
| WJRP | James Wormley Recognition Project |
| WJS | William James Society |
| WJSF | Wei Jing Sheng Foundation |
| WKAS | Western Kentucky Autism Society |
| WKK | Wagad Kala Kendra |
| WKKF | Will Keith Kellogg Foundation |
| WKKI | W. K. Kellogg Institute for Food and Nutrition Research |