| WASA | Wadsworth Amateur Soccer Association 
| Others |
| WASA | Wank Adams Slavin Associates
| Others |
| WASA | Warte Auf Schnelle Antwort
| Others |
| WASA | Washington Aeronautics and Space Administration
| Others |
| WASA | Washington Association of School Administrators
| Others |
| WASA | Water And Sanitation Agency
| Others |
| WASA | Water And Sanitation Authority
| Others |
| WASA | Water And Sewage Authority
| Others |
| WASA | Water And Sewer Authority
| Others |
| WASA | Water And Sewerage Authority
| Others |
| WASA | Wax Anti Settling Additive
| Others |
| WASA | Wealthy Adaptive Search Algorithm
| Others |
| WASA | Web Application Security Analyst
| Others |
| WASA | Web Application Security Assessment
| Others |
| WASA | Web Audience Semantic Analysis
| Others |
| WASA | West Africa Student Association
| Others |
| WASA | Westborough Athletic and Social Association
| Others |
| WASA | Western Action Shootists Association
| Others |
| WASA | Western Alternative Sports Association
| Others |
| WASA | Western Alternative Sports Association Western Alternative
| Others |
| WASA | Western Amputee Support Alliance
| Others |
| WASA | Western Australian Softball Association
| Others |
| WASA | Western Australian Specialty Alloys
| Others |
| WASA | Westerville Amateur Soccer Association
| Others |
| WASA | Westford Against Substance Abuse
| Others |
| WASA | Westport Animal Shelter Advocates
| Others |
| WASA | Westport Animal Shelters Advocates
| Others |
| WASA | Wharton Africa Student Association
| Others |
| WASA | Wharton African Students Association
| Others |
| WASA | Wild About Sports Academy
| Others |
| WASA | Willcox Against Substance Abuse
| Others |
| WASA | Wireless Algorithms Systems and Applications
| Others |
| WASA | Wisconsin Adaptive Sports Association
| Others |
| WASA | Wisconsin Adult Soccer Association
| Others |
| WASA | Working Against Smooth Asphalt
| Others |
| WASA | World Arena Skating Academy
| Others |
| WASA | Wyoming Association of School Administrators
| Others |