Guam Organized as Territory

Date: August 1, 1950 • Location: Faraulep Municipality, Micronesia, Federated States of

Guam is organized as an unincorporated territory of the United States as the President Harry S. Truman signs the Guam Organic Act.

Guam is an organized, unincorporated territory of the United States in the Micronesia subregion of Oceania, in 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).