| Abbreviation | Definition |
|---|---|
| LYNC | Lancaster Youth Network of Churches |
| LYNC | Linking Youth and Communities |
| LYO | Louisiana Youth Orchestra |
| LYO | Louisiana Youth Orchestras |
| LYO | Louisville Youth Orchestra |
| LYO | Lutheran Youth Organization |
| LYO | Lutoslawski Youth Orchestra |
| LYON | Lutheran Youth of Nebraska |
| LYP | Leatherhead Youth Project |
| LYPP | Lafayette Youth Poetry Prize |
| LYRD | Latino Youth Recognition Days |
| LYRIC | Lavender Youth Recreation and Information Center |
| LYS | Lighthouse Youth Services |
| LYS | Lincoln Youth Symphony |
| LYS | Local Youth Service |
| LYS | Louisiana Youth Seminar |
| LYS | Lynden Youth Sports |
| LYSN | Louisville Youth Sports Network |
| LYSS | Ludington Youth Sailing School |
| LYST | London Youth Support Trust |