Puerto Rico hosts several active U.S. military installations that support training, logistics, emergency response, and regional operations.
These installations include Army, Air National Guard, and Coast Guard facilities that operate across the island.
Puerto Rico continues to serve as a strategically located hub for defense, humanitarian support, and coordination activities in the Caribbean region.
Army Bases In Puerto Rico
Camp Santiago
Location: Salinas, PR
In Use: 1940-present
Overall Mission: This is a joint training base for America’s Armed Forces and allies.
The U.S. Army, Air National Guard, and U.S. Army Reserves all use this base for training and as a staging point during wartime.
The installation may host authorized training and youth program activities.
Units Stationed: N/A
Official Site: N/A
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Fort Buchanan
Location: San Juan, PR
In Use: 1923-present
Overall Mission:Multiple branches and components use the installation for training and support activities.
The base also serves as a support system for locals during natural disasters, such as hurricanes.
The base is mostly used to house U.S. Army reserve units but it does have several units stationed here.
Units Stationed:
- 1/350th Logistics Support Battalion
- 174th Ctr Legal Operations Detachment
- 1st Battalion, 389th Regiment
- 2-348th Battalion
- 265 Headquarters, 5th Brigade, 94th TR
- U.S. Marine Corps Detachment 1, Landing Support Company, Combat Logistics Regiment 45
Official Site: https://home.army.mil/buchanan/
Fort Allen
Location: Juana Diaz, PR
In Use: 1941-present
Overall Mission: The base originated as a staging point for the Army Air Corps during W.W.2.
Since 1980, there have been no active duty units from any branch of the Armed Forces stationed here.
This is where the Puerto Rico National Guard and Army Reserve has several units.
Units Stationed:
- 191st Regional Support Group
- 240th Military Police Company
- 192nd Support Battalion, C Company (Med)
- 105th Quartermaster Company
- 482nd Chemical Company
- 714th Quartermaster Company
Official Site: N/A
Air Force Bases In Puerto Rico
Muñiz ANG Base
Location: San Juan, PR
In Use: 1956-present
Overall Mission: This is where the Puerto Rican Air National Guard is headquartered.
The base also serves as a humanitarian aid station for local natural disasters.
The base serves as a rally and distribution point for the U.S. Armed Forces during wartime.
Units Stationed:
- 156th Wing (ANG)
Official Site: https://www.156wg.ang.af.mil/
Related Article – Military Bases In California
Coast Guard Bases In Puerto Rico
USCG Air Station Boriquen
Location: Aguadilla, PR
In Use: 1971-present
Overall Mission: The main goal of the base is search and rescue in the surrounding areas.
The base also provides logistic, aerial, and law enforcement services and support for any operations in the area.
It was an important staging point in wartime for the U.S. Armed Forces and its allies.
Official Site: https://www.atlanticarea.uscg.mil/Our-Organization/District-7/Units/Air-Station-Borinquen/
What People Get Wrong About Military Bases in Puerto Rico
A common misconception is that Puerto Rico hosts large active-duty bases from every military branch.
In reality, current installations primarily support the Army, National Guard, and Coast Guard, with no permanent Navy or Marine Corps bases.
Some people assume that all military facilities in Puerto Rico house active-duty combat units.
Several installations are used mainly for training, reserve operations, staging, or emergency response rather than permanent active-duty assignments.
Another misunderstanding is that Puerto Rico’s military role is limited to local or regional missions.
The island’s location allows installations to support broader U.S. and allied operations, particularly in logistics, disaster response, and maritime security.
There is also confusion about the age and relevance of these bases.
While some facilities have long histories, they continue to operate under modern mission requirements and updated organizational structures.
Finally, some believe military installations in Puerto Rico are inactive unless a major conflict occurs.
Many facilities maintain ongoing readiness activities, training schedules, and support functions during peacetime.
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