1 Squadron

1 Squadron, 1st Squadron or No. 1 Squadron may refer to:

Australia

 * No. 1 Squadron RAAF
 * No. 1 Airfield Operations Support Squadron RAAF
 * No. 1 Security Forces Squadron RAAF

United Kingdom

 * No. 1 Squadron RFC, Royal Flying Corps
 * No. 1 Squadron RAF, Royal Air Force
 * No. 1 Squadron RAF Regiment
 * No. 1 Squadron RNAS, Royal Naval Air Service
 * 1st Frigate Squadron (United Kingdom)

United States

 * 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 Helicopter Squadron
 * 1st Reconnaissance Squadron
 * 1st Space Control Squadron
 * 1st Space Launch Squadron
 * 1st Space Operations Squadron
 * 1st Special Operations Squadron
 * VBF-1, Bombing Fighting Squadron One, U.S. Navy
 * Fighter Plane Squadron 1, VF-1, U.S. Navy
 * Fighter Squadron 1 (United States Navy), VF-1
 * Marine Air Control Squadron 1, U.S. Marine Corps
 * Destroyer Squadron 1, U.S. Navy
 * Submarine Squadron 1, U.S. Navy
 * Coast Guard Squadron One

Other countries

 * No. 1 Squadron RNZAF, New Zealand
 * No. 1 Squadron IAF, India
 * 1 Squadron SAAF, South Africa
 * 1st Squadron (Belgium)
 * No. 1 Squadron RBAF, Brunei Darussalam