U.S. territory in Micronesia Guam is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. Guam's capital is Hagåtña, and the most populous village is Dededo. It is the westernmost point and territory of the United States, reckoned from the geographic center of the U.S. In Oceania, Guam is the largest and southernmost of the Mariana Islands and the largest island in Micronesia. As of September 2026, its population was 170,476. Chamorros are its largest ethnic group, but a minority on the multiethnic island. The territory spans 210 square miles and has a population density of 775 per square mile (299/km2). 191,704 views on August 12, 2017 — Wikipedia's most-read article that day. Also most read: Hiroshima Peace Memorial Park, Mo Farah, Usain Bolt, Annabelle: Creation. Wiki link