Aur Atoll (Marshallese: Aur, [ɑurˠ][1]) is a coral atoll of 42 islands in the Pacific Ocean, and forms a legislative district of the Ratak Chain of the Marshall Islands.

Its total land area is only 15 square kilometers (5.6 sq mi), but it encloses a lagoon with an area of 620 square kilometers (240 sq mi).

[2] Aur Atoll was claimed by the German Empire along with the rest of the Marshall Islands in 1885.

[3] After World War I, the island came under the South Seas Mandate of Japan.

Following the end of World War II, Aur came under the control of the United States as part of the Trust Territory of the Pacific Islands.