11 Squadron
- 11 Squadron (Belgium)
- 11 Squadron (Qatar)
- 11th Army (disambiguation)
- 11th Battalion (disambiguation)
- 11th Bomb Squadron (United States)
- 11th Brigade (disambiguation)
- 11th Division (disambiguation)
- 11th Group (disambiguation)
- 11th Operational Weather Squadron (United States)
- 11th Reconnaissance Squadron (United States)
- 11th Regiment (disambiguation)
- 11th Troop Carrier Squadron
- Marine Aviation Logistics Squadron 11
- No. 11 Squadron (Finland)
- No. 11 Squadron PAF
- No. 11 Squadron RAAF
- No. 11 Squadron RAF
- Submarine Squadron 11
- VFA-11
- XI Corps (disambiguation)