| Abbreviation | Definition |
|---|---|
| LSD | Long Slow Distance |
| LSO | Lakota Sports Organization |
| LSO | Lansing Swim Organization ( Lansing, Michigan) |
| LSQHA | Lone Star Quarter Horse Association |
| LSR | Lady Sport Riders |
| LSR | Laguna Seca Racetrack |
| LSR | Land Speed Record |
| LSRC | L Street Running Club |
| LSS | Luxury Sports Sedan |
| LSSE | Lone Star Sports Entertainment |
| LSV | Lüner Sportverein |
| LT | LaDainian Tomlinson |
| LT | Ladainian Tomlinson (football player) |
| LT | Lap Time |
| LT | Lawrence Taylor |
| LTA | Lawn Tennis Association |
| LTA | Louisiana Tennis Association |
| LTC | Losing Trick Count |
| LTF | Libertyville Tennis and Fitness |
| LTF | Life Time Fitness |