Guguan is an island in the Northern Mariana Islands in the Pacific Ocean. The island is currently uninhabited. Guguan is located 30 nautical miles (56 km) south from Alamagan and 250 nautical miles (463 km) north from Saipan, and is 67 nautical miles (124 km) northeast from Sarigan.

Alamagan is an island in the Northern Mariana Islands in the Pacific Ocean, 30 nautical miles (56 km) north of Guguan, 250 nautical miles (463 km) north of Saipan, and 60 nautical miles (111 km) south of Pagan. It is currently undergoing resettlement since 2018, with a few people living there. The project was coordinated by the Northern Islands Mayor's office and the people there have radio contact with the mainland.