Alamagan is an island located in the Northern Mariana Islands within the Pacific Ocean. It is situated approximately 30 kilometres (16 nmi) north of Guguan, 250 kilometres (135 nmi) north of Saipan, and 60 kilometres (32 nmi) south of Pagan.
The island has been undergoing a resettlement project since 2018, which currently maintains a small population. This initiative is coordinated by the Northern Islands Mayor's office, and residents on the island maintain radio contact with the mainland.