Aur Atoll (Marshallese: Aur, [ɑ̯ɑ͡ɒu̯u͡ɯrˠ]) 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 kilometres (5.6 sq mi), but it encloses a lagoon with an area of 620 square kilometres (240 sq mi). It is located south of Maloelap Atoll. The population of Aur Atoll was 438 in 1998.