Diego Garcia is a tropical, footprint-shaped, coral atoll located seven degrees south of the equator in the British Indian Ocean Territory (BIOT). Diego Garcia consists of United States Navy and Air Force personnel assigned here to carry out the Island's mission:

"To maintain and operate facilities and provide services and materials in support of afloat units, operating forces on forward deployment, and tenant shore activities."

Tenant Commands: (listed in alphabetical order)

1) Air Mobility Command (AMC) Detachment ONE, 730 AMS

2) Automated Remote Tracking Station (ARTS) Air Force Space Command (AFSPC) Detachment 2, 22nd Space Operations Squadron

3) Branch Health Clinic (BHC), Diego Garcia

4) Maritime Pre-positioning Ship Squadron (COMPSRON) TWO

5) U.S. Fleet and Industrial Supply Center (FISC), Diego Garcia Detachment

6) Ground -based Electro Optical Deep Space Surveillance (GEODSS) Air Force Space Command Detachment TWO, 21 Operations Group

7) Military Sealift Command Office (MSCO)

8) U.S. Naval Computer and Telecommunications Station Far East Detachment (NCSTFE DET)

9) Naval Media Center Detachment Diego Garcia

10) Pacific Air Force (PACAF) Detachment ONE, 36 Mission Support Group (MSG)

11) Personnel Support Activity Detachment Diego Garcia (PSD)

12) Public Works Department (PWD), Naval Facilities Engineering Command Far East (NAVFAC FE), Diego Garcia
 

Island Population:

Total Military: ~ 360

• USN = 280
• USAF = 40 (700 - 900 with AEG)
• Brit Forces = 40

Total Civilian: ~ 220

• BOSC = 1800
• Overseas Gov Employees = 80
• Mariners (MSC) = 300

Total Population: ~2,500