| Acronym | Definition |
|---|
| WCAA | Window Coverings Association of America |
| WCAA | Workers Compensation Amendment Act (Canada) |
| WCAA | Wayne County Airport Authority |
| WCAA | Woodlands Christian Athletic Association (Woodlands, Texas) |
| WCAA | Windy City Athletic Association (Chicago, Illinois) |
| WCAA | Wayne County Arts Alliance (Pennsylvania) |
| WCAA | Wellesley College Alumnae Association |
| WCAA | Wyoming Children's Action Alliance |
| WCAA | World Commercial Aircraft Accidents |
| WCAA | West Central Auto Auction |
| WCAA | West Chester Auto Auction |
| WCAA | World Chlor-Alkali Analysis |
| WCAA | Western Classified Advertising Association |
| WCAA | World Council of Anthropological Associations |
| WCAA | Western College Alumnae Association |
| WCAA | Wesley Chapel Athletic Association (Arkansas and Florida) |
| WCAA | Weight Class Athletic Association |
| WCAA | Water Conservation Association of Australia |
| WCAA | Western Colorado Angus Association |
| WCAA | Wyoming Community Action Association |
| WCAA | Walsh Code Assignment Algorithm |
| WCAA | Washington Clean Air Act |
| WCAA | Walker County Arts Alliance |
| WCAA | West Coast Airsoft Association (various locations) |
| WCAA | Weld County Apartment Association (Colorado) |