List of United States Marine Corps aircraft squadrons

This is a list of all of the active squadrons that exist in the United States Marine Corps, sorted by type. Most squadrons have changed names and designations many times over the years, so they are listed by their current designation.

The basic tactical and administrative unit of United States Marine Corps aviation is the squadron. Fixed-wing aircraft squadrons (heavier than air) and tiltrotor squadrons are denoted by the letter "V", which comes from the Spanish verb "volar" (to fly). Rotary wing (helicopter) squadrons use "H." Marine squadrons are always noted by the second letter "M." Squadron numbering is not linear as some were numbered in ascending order and others took numbers from the wing or the ship to which they were assigned. From 1920 to 1941, Marine flying squadrons were identified by one digit numbers. This changed on July 1, 1941 when all existing squadrons were redesignated to a three-digit system. The first two numbers were supposed to identify the squadrons parent group but with the rapid expansion during World War II and frequent transfer of squadrons this system fell apart.

The squadron is responsible for the helicopter transportation of the President of the United States, Vice President, Cabinet members and VIPs. In addition to its VIP transport role, it is also tasked with operational test and evaluation (OT&E) of new flight systems for Marine Corps helicopters. The squadron flies the VH-3D Sea King the VH-60N Whitehawk, and the MV-22 Osprey. These were due to be replaced by the VH-71 Kestrel, however that program was cancelled in April 2009. Lastly, HMX-1 provides support to training at The Basic School, providing aerial insertion for various training events, as well as MAGTF Air component orientation to the student officers.

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