WTU
| Acronym | Definition |
|---|---|
| WTU | Warrior Transition Unit (Army) |
| WTU | Washington Teachers Union |
| WTU | Washington Theological Union |
| WTU | Whitetails Unlimited |
| WTU | Want to Upgrade (computing) |
| WTU | Water Treatment Unit (various companies) |
| WTU | Weighted Teaching Units |
| WTU | Withholding Tax Update (Wisconsin) |
| WTU | Write-Through Update (computing) |
| WTU | Works Training Unit |
| WTU | Weapons and Tactics Unit |
| WTU | Ward Test Urine |