51st state
Guam (formally the Territory of Guam) is an unincorporated and organized territory of the United States. Located in the western Pacific Ocean, Guam is one of five American territories with an established civilian government.
Flags of country subdivisions (Oceania)
The Federated States of Micronesia is a federal republic that has entered into a compact of free association with the United States. It has four states, each of which has its own official flag.
Guam is a self-governing territory of the United States. It has no first-order administrative divisions.