Rose Atoll is an oceanic atoll within the U.S. territory of American Samoa. It is an uninhabited wildlife refuge. It is the southernmost point in the United States. The land area is 0.214 km² (52.8 acres). The total area of the atoll, including lagoon and reef flat amounts to 5 km². Just west of the northernmost point is a channel into the lagoon, about 40 meters wide. There are two islets on the northwestern rim of the reef, larger Rose Island in the east (3.5 m high) and the non-vegetated Sand Island in the north (1.5 m high).
The first documented sighting by a Westerner was by Louis de Freycinet in 1819.