| Acronym | Definition |
|---|
| WCA | Willow Creek Association |
| WCA | Water Contact Angle (surface science) |
| WCA | World Cube Association (Rubik's Cube) |
| WCA | Women's Caucus for Art |
| WCA | World Cargo Alliance (est. 1998) |
| WCA | Wireless Communications Association International |
| WCA | World Chiropractic Alliance |
| WCA | Water Conservation Area |
| WCA | Wireless Communications Association |
| WCA | World Cheese Awards (consumer food show) |
| WCA | Wireless Communications Alliance (non-profit; Northern California) |
| WCA | Wildlife Conservation Area (various locations) |
| WCA | Whalley Computer Associates |
| WCA | Workmen's Compensation Act (various nations) |
| WCA | Worst Case Analysis |
| WCA | Workers' Compensation Administration |
| WCA | World Championships in Athletics (International Association of Athletics Federations) |
| WCA | World Clown Association |
| WCA | Waste Collection Authority (UK) |
| WCA | Wind Correction Angle (aviation) |
| WCA | Wollongong College Australia (University of Wollongong) |
| WCA | Western and Central Africa |
| WCA | World Cheerleading Association |
| WCA | Wisconsin Cycling Association |
| WCA | Woodlands Community Association (various locations) |
| WCA | Wildlife & Countryside Act 1981 |
| WCA | West Coast Angler (fishing resource) |
| WCA | Women in Corporate Aviation (Southhaven, Mississippi, USA) |
| WCA | Women Contractors Association |
| WCA | Weingart Center Association (Los Angeles, CA) |
| WCA | Washington Council of Agencies |
| WCA | Wireless Consumers Alliance |
| WCA | Weighted Combined Algorithm (computing) |
| WCA | Washtenaw Christian Academy (Saline, Michigan) |
| WCA | Wireless Cable Association International |
| WCA | Washington Correctional Association |
| WCA | Washington Counseling Association |
| WCA | Waveform Concatenation Approach (speech synthesis development tool) |
| WCA | Wing Chun Archive (martial arts) |
| WCA | Wool Council of Australia |
| WCA | Water Clearance Authority |
| WCA | Weighted Critical Area |
| WCA | Willow Creek Academy (Sausalito, CA) |
| WCA | Warranty Claim Action |
| WCA | Warner Christian Academy (South Daytona, FL) |
| WCA | Weighted Curvature Approximation |
| WCA | Whole Core Accident |
| WCA | Water Commodity Adjustment |
| WCA | Warning, Caution, and Advisory (aviation) |
| WCA | Warhorse Challenge Association |
| WCA | Women Christian Association (USA) |
| WCA | Winter Cities Association (Canada) |
| WCA | Weed Control Act (Canada) |
| WCA | Wing Correction Angle (aviation) |
| WCA | Waste Combustion Air |
| WCA | Weapons Coverage Area (US Navy) |
| WCA | Weapons Control System Alignment Procedures |
| WCA | Workforce Cultural Audit |
| WCA | Warning, Control Advisories (avionics monitoring flags) |