The Supreme Court of Guam is the highest court in the U. S. territory of Guam. Guam ( Chamorro: cha Guåhån) officially the Territory of Guam, is an island in the western Pacific Ocean and is an organized unincorporated Its jurisdiction should not be confused, however, with the federal District Court of Guam. The United States territorial courts are tribunals established in territories of the United States by the United States Congress, pursuant to its power under The District Court of Guam (also known as the United States District Court for the District of Guam) is a United States territorial court with jurisdiction over the The Supreme Court sits in the Guam Judicial Center in Hagåtña, Guam and is composed of three justices. Hagåtña (həˈɡɑtɲə formerly Agana and in Spanish Agaña, is the Capital of the American island territory of Guam.