1 Squadron
- 1 Squadron SAAF
- 1st Air and Space Test Squadron
- 1st Airborne Command Control Squadron
- 1st Airlift Squadron
- 1st Combat Communications Squadron
- 1st Expeditionary Space Control Squadron
- 1st Fighter Squadron
- 1st Frigate Squadron (United Kingdom)
- 1st Helicopter Squadron
- 1st Reconnaissance Squadron
- 1st Space Control Squadron
- 1st Space Launch Squadron
- 1st Space Operations Squadron
- 1st Special Operations Squadron
- 1st Squadron (Belgium)
- Coast Guard Squadron One
- Destroyer Squadron 1
- Fighter Plane Squadron 1
- Fighter Squadron 1 (United States Navy)
- Marine Air Control Squadron 1
- No. 1 Airfield Operations Support Squadron RAAF
- No. 1 Security Forces Squadron RAAF
- No. 1 Squadron IAF
- No. 1 Squadron RAAF
- No. 1 Squadron RAF
- No. 1 Squadron RAF Regiment
- No. 1 Squadron RFC
- No. 1 Squadron RNAS
- No. 1 Squadron RNZAF
- Submarine Squadron 1
- VBF-1