YO
| Acronym | Definition |
|---|---|
| YO | York (postcode, United Kingdom) |
| YO | Year Old |
| YO | Yarn Over (knitting) |
| YO | Years Old |
| YO | Yugoslavia |
| YO | Yoko Ono |
| YO | Young Ones (Naturistische Activiteiten Vereniging) |
| YO | Yeah, Okay |
| YO | Youth Orchestra (various locations) |
| YO | Youthful Offender |
| YO | Young Offender (Ontario) |
| YO | Yearly Output |
| YO | Fuel Oil Barge (Self-Propelled) |
| YO | District Barge, Fuel Oil (US Navy) |