LYO
| Acronym | Definition |
|---|---|
| LYO | Lutheran Youth Organization (Chicago, IL) |
| LYO | Lyondell Chemical Company (stock symbol) |
| LYO | Leeds Youth Opera (UK) |
| LYO | Louisville Youth Orchestra |
| LYO | Lubavitch Youth Organization |
| LYO | Littleton Youth Orchestra (Littleton, CO) |