Marine Air, West Coast (MarAirWest) was a United States Marine Corps aviation training and administrative command established on 22 January 1943, which was responsible for the administration, training and equipment of the Marine Aviation Units on the West Coast during World War II.

MarFAirWest was also responsible for providing personnel, equipment and other aviation material to the Aircraft Command, Fleet Marine Force, Pacific.

[2][3] It was re-designated Marine Air, West Coast in January 1946 and authority for the new designation also consolidated the command with that of the Deputy Commander, Naval Air Bases (Marine Corps Activities), 11th Naval District, formerly situated at Marine Corps Air Station El Toro, Santa Ana, California.

Its purpose remained the same - still responsible for supporting Aircraft, Fleet Marine Force, Pacific.

The unit was deactivated on 1 October 1947 when the 1st Marine Aircraft Wing returned from overseas duty in China and assumed the commands roles and responsibilities.