Selfridge Air National Guard Base or Selfridge ANGB (IATA: MTC, ICAO: KMTC, FAA LID: MTC) is an Air National Guard installation located in Harrison Township, Michigan, near Mount Clemens. Selfridge Field was one of thirty-two Air Service training camps established after the United States entry into World War I in April 1917.

The host organization is the 127th Wing (127 WG) of the Michigan Air National Guard, but a variety of Air Force Reserve, Navy Reserve, Marine Corps Reserve, Army Reserve, Army National Guard, and active duty Coast Guard units use the facility as well. In 1971, Selfridge ANGB became the largest and most complex joint Reserves Forces base in the United States, a position it held until surpassed by NAS JRB Fort Worth (former Carswell AFB) in the late 1990s.

U.S. Army Garrison-Selfridge serves the Tank-automotive and Armaments Command (TACOM) supporting tank construction in the Detroit area.

The airport is home to the 176th Selfridge Composite Squadron of the Civil Air Patrol (CAP), the auxiliary civilian arm of the US Air Force, as well as the headquarters of CAP's Michigan Wing.

Selfridge is home to Headquarters and Service Company, 1st Battalion, 24th Marines and Marine Wing Support Group 47 (MWSG-47).

The base is also home to Detachment 1, Company B, 3-238th General Support Aviation Battalion, which currently flies the CH-47 Chinook.

The on-base Selfridge Military Air Museum is operated by the Michigan Air Guard Historical Association, exhibits photos and artifacts of military aerospace history, and has an outdoor Air Park of over 30 aircraft.

Selfridge Air National Guard Base is named after 1st Lieutenant Thomas E. Selfridge. He was detailed for aeronautical duty in April 1908 after being an assistant to Professor Alexander Graham Bell, who was conducting aeronautical experiments in Nova Scotia. Selfridge was killed on 17 September 1908 while flying as a passenger with Orville Wright at Fort Myer, Virginia. He was the first person to be killed in a crash of a powered aircraft.