Sarigan or Sariguan is an uninhabited volcanic island in the Pacific Ocean. It is part of the Northern Mariana Islands, a U.S. territory. Sarigan is located 37 kilometers northeast of Anatahan island, 67 km south of Guguan and 150 km north of Saipan, the largest island in the Northern Marianas. The island has been sparsely populated, but in modern tim…Sarigan or Sariguan is an uninhabited volcanic island in the Pacific Ocean. It is part of the Northern Mariana Islands, a U.S. territory. Sarigan is located 37 kilometers northeast of Anatahan island, 67 km south of Guguan and 150 km north of Saipan, the largest island in the Northern Marianas. The island has been sparsely populated, but in modern times has been uninhabited due to volcanic activity. It is a currently a nature preserve.