Chuuk Lagoon
Namonuito Atoll lies in the northwestern region ("Oksoritod") of Chuuk State, the largest federal state of the Federated States of Micronesia, about northwest of Chuuk Lagoon (measured from Pisaras Islet to the northern and western parts of the fringing reef of Chuuk Lagoon. It is roughly triangular in shape, with the base running along its southern side.