Tromelin Island is a low, flat 0.8-square-kilometre (200-acre) island in the Indian Ocean, about 350 kilometres (220 mi) east of Madagascar. There are no harbours or anchorages and access by sea is difficult. The island has a 1,200-metre (3,900 ft) airstrip. It is a French territory. It is claimed by Mauritius and Seychelles.
Tromelin is a low, scrub-covered sandbank about 1,700 metres (1.1 mi) long and 700 metres (0.43 mi) wide, surrounded by coral reefs. The island is 7 metres (23 ft) high at its highest point. It is a nesting site for seabirds and turtles.