The United States maintains a limited permanent military presence in Australia through two long-standing joint or cooperative facilities.
These locations support intelligence and communications missions rather than traditional force basing, and they operate in coordination with the Australian government.
This article outlines the two U.S.-associated military facilities currently operating in Australia and their general roles.
What People Get Wrong About U.S. Military Bases in Australia
U.S. military bases in Australia are often assumed to function like large, independent installations found elsewhere in the world, but the facilities in Australia operate primarily as joint or cooperative sites with the Australian government.
Another common misconception is that multiple U.S. service branches maintain permanent bases there, when the presence is limited to specific intelligence and communications missions.
These locations are also sometimes described as secret or unofficial, despite being publicly acknowledged and operating under formal bilateral agreements.
Finally, U.S. military activity in Australia is frequently overstated, even though the permanent footprint remains relatively small.
Intelligence
Pine Gap
Location: Alice Springs, Australia
In Use: 1966-Present
Overall Mission: Since the Cold War, Pine Gap has served as a surveillance base.
It is jointly owned by the U.S. and Australia and was initially known as the “Joint Defence Space Research Facility.”
The official name changed in 1988 to the “Joint Defence Facility Pine Gap” and is responsible for monitoring the signals of satellite and intelligence signals including microwave emissions, anti-missile, and anti-aircraft radar, among others.
Units Stationed:
- Central Intelligence Agency (CIA)
- National Security Agency (NSA)
- US National Reconnaissance Office (NRO)
Official Site: None
Related Article – Air Force Bases in the US
US Navy Base in Australia
Naval Communication Station Harold E. Holt
Location: Exmouth, Western Australia, Australia
In use: 1967-Present
Overall Mission:The only other US military base in Australia is the Naval Communication Station Harold E. Holt, located in northwestern Australia.
The station is operated and maintained by Australia’s Department of Defence, and it provides very low frequency (VLF) radio transmission communications to the United States Navy, the Royal Australian Navy, and their allies.
It serves as a communications hub for ships and submarines operating in the western Pacific and eastern Indian Oceans.
Units Stationed:
N/A
- 5-Tier 1 Operators / Special Mission Units Explained (2026 Update) - June 20, 2024
- Navy vs. Marines: 5 Key Differences - June 20, 2024
- Was Mr. Rogers in the Military Or A SEAL? Facts Guide For 2026 - June 20, 2024
