Location #1: Judge Advocate General
At St. Elizabeth’s Hospital, 1100 Alabama Avenue Northeast, Washington, D.C., United States
Location #2: The baseball field
West Potomac Park, West Basin Drive Southwest, Washington, D.C., United States
Location #3: Lt. Galloway’s office
At U.S. Department of Commerce, 1401 Constitution Avenue Northwest, Washington, D.C., United States
Location #4: The barracks
Fort MacArthur, Los Angeles, California, United States
Location #5: Lt. Kaffee walks Sam home
To 2415 20th Street Northwest, Washington, D.C., United States
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I specifically searched for the location supposedly being Guantanamo, Cuba. In looking at the film sites shown that location is not listed. Great Movie
Its obvious A Few Good Men was never shot a GTMO.