315th
- 315
- 315 (number)
- 315 BC
- 315th (Kirkcudbright) Field Battery, Royal Artillery
- 315th (North Midland) Medium Regiment, Royal Artillery
- 315th Air Division
- 315th Airlift Wing
- 315th Bombardment Squadron
- 315th Cavalry Regiment (United States)
- 315th Cyberspace Operations Squadron
- 315th Engineer Battalion
- 315th Fighter Squadron
- 315th Operations Group
- 315th Polish "Deblinski" Fighter Squadron
- 315th Rifle Division (Soviet Union)
- 315th Troop Carrier Squadron
- 315th Weapons Squadron