Bassas da India () is an uninhabited, roughly circular French atoll that is part of the French Southern and Antarctic Lands. Located in the southern Mozambique Channel, about halfway between Mozambique and Madagascar (about further east) and around northwest of Europa Island, the rim of the atoll averages around in width and encloses a shallow lagoon of depth no greater than . Overall, the atoll is about in diameter, rising steeply from the seabed below to encircle an area (including lagoon) of . Its exclusive economic zone (EEZ), in size, is contiguous with that of Europa Island.