WEBSep 4, 2021 · Diego Garcia, one of the 52 coral atolls of the Chagos Archipelago, is located in the Indian Ocean 960 miles south of India and 7 miles south of the equator. The 6,700 acre, heavily vegetated atoll is horseshoe-shaped with a perimeter of approximately 40 miles and average elevations of 3 to 7 feet.