The Puerto Rico Air National Guard (PR ANG) —Spanish: Guardia Nacional Aérea de Puerto Rico— is the aerial militia of the Commonwealth of Puerto Rico, an unincorporated territory of the United States of America. It is, along with the Puerto Rico Army National Guard and the Puerto Rico State Guard, an element of the Puerto Rico National Guard. After beginning as four units, the PRANG expanded to 11 units by the 1980s, including the 1956th Tactics Combat Group, the 140th Radar Squadron and others.

The Puerto Rico State Guard is the state defense force of Puerto Rico that operates under the sole authority of the governor of Puerto Rico who, in turn, delegates such authority to the Puerto Rico Adjutant General. The Guard's secondary purpose is to assume the state mission of the Puerto Rico National Guard in the event that the National Guard is mobilized. The first incarnation of the PRSG was created in 1941 in response to World War II and it disbanded in 1946. The PRSG was revived in 1971 and has remained in continuous existence since then. It is one of the few state defense forces of the United States that has an air division.