337th
- 337
- 337 (number)
- 337 BC
- 337 Squadron (disambiguation)
- 337th Aeronautical Systems Group
- 337th Air Control Squadron
- 337th Airlift Squadron
- 337th Brigade, Royal Field Artillery
- 337th Flight Test Squadron
- 337th Independent Helicopter Regiment
- 337th Infantry Division (Wehrmacht)
- 337th Infantry Regiment (United States)
- 337th Rifle Division (Soviet Union)
- 337th Test and Evaluation Squadron
- 337th Volksgrenadier Division (Wehrmacht)