| Abbreviation | Definition |
|---|---|
| LCT | Lincoln Center Theater |
| LCT | Lubbock Community Theatre |
| LCTC | Left Coast Theatre Co |
| LDT | Longmont Dance Theatre |
| LGDT | Leah Glen Dance Theatre |
| LGDT | Leah Glenn Dance Theatre |
| LGMT | Lisa Giobbi Movement Theatre |
| LGTC | Little Grand Theatre Company |
| LGTL | Lake George Theater Lab |
| LHYT | Lockport-Homer Youth Theater |
| LMS | Lightweight Modular Staging |
| LNDT | Lietuvos Nacionaliniame Dramos Teatre (Lithuanian: Lithuanian National Drama Theatre) |
| LNTP | Leading National Theatres Program |
| LOCT | League of Chicago Theatres |
| LOT | LIVE OUTDOOR THEATER |
| LPRT | Little People Repertory Theatre |
| LPT | Light Projects Team |
| LRDT | Lindsay Renea Dance Theatre |
| LSDT | Light Switch Dance Theatre |
| LT | Lecture Theatre |