Which state of the Federated States of Micronesia contains Chuuk Lagoon?

Chuuk Lagoon is contained within Chuuk State of the Federated States of Micronesia.

The lagoon is a vast natural harbor enclosed by a protective coral reef in the central Pacific. Its reef stretches about 225 kilometers around waters measuring roughly 79 by 50 kilometers. The lagoon includes numerous islands, with Weno serving as both the capital of Chuuk State and the administrative center of the surrounding atoll. Weno is also the largest city in the Federated States of Micronesia.

Chuuk Lagoon was formerly known internationally as Truk Lagoon, a name derived from an older rendering of the local name. During World War II, Imperial Japan used it as a major naval base. In February 1944, the United States launched Operation Hailstone, sinking or damaging many Japanese ships and aircraft. The wrecks remain underwater and have made the lagoon a famous destination for technical and wreck diving.

The lagoon should not be confused with the entire country or with Chuuk Island alone. Chuuk State includes the lagoon as well as other islands and island groups. The state itself is one of the federation’s four states, alongside Yap, Pohnpei, and Kosrae.