WELCOME TO GUAM! The island of Guam is located approximately 3,300 miles West of Hawaii, and 1,500 miles east of the Philippines and south of Japan. Guam is a territory of the United States and its residents are US citizens. The island is about 36 miles long, 6-12 miles wide and in many ways Guam is an all American community. But its multi-cultural ethnic mix offers a microcosm of the world. Guam's own rich Chamorro culture and heritage draws visitors from Japan, other Asian countries and Europe.