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.
Postage stamps and postal history of Guam
The postage stamps and postal history of Guam is an overview of the postage stamps and postal history of the United States territory of Guam. Its postal service is linked to those of the Philippines during the Spanish Empire and, since 1898, to the United States of America. A peculiarity is that, for a short period in the 1930s, Guam had a local post service.