| Acronym | Definition |
|---|
| WCO | World Customs Organization |
| WCO | West Corona (Amtrak station code; West Corona, CA) |
| WCO | World Customs Organisation (Brussels, Belgium) |
| WCO | Wildlife Conservation Office (various locations) |
| WCO | Wisconsin Chamber Orchestra (Madison, WI) |
| WCO | West Coast Offense (football) |
| WCO | World Culture Open (various locations) |
| WCO | World Currency Option (stock index) |
| WCO | World Cagefighting Organization |
| WCO | Washington Concert Opera |
| WCO | Wine Council of Ontario (St. Catharines, Ontario, Canada) |
| WCO | World Class Office (Dutch management training) |
| WCO | Workplace Contact Officer |
| WCO | Wet Chemical Oxidation |
| WCO | Weapon Control Order |
| WCO | Wet Catalyzed Oxidation |
| WCO | Worldwide Customer Operations |
| WCO | Warehouse Capacity Owner |