Unanu, also known as Onari, is an island in the east of Namonuito Atoll and a municipality in the state of Chuuk, Federated States of Micronesia. It is located 8°45'12.4"N 150°20'20.5"E.

8°45′13″N 150°20′21″E/8.7536°N 150.3393°E/ 8.7536; 150.3393