Guam (/ ˈ ɡ w ɑː m / ⓘ GWAHM; Chamorro: Guåhan [ˈɡʷɑhɑn]) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. [5] [6] 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.