Isachsen was a remote arctic research station on the western shore of Ellef Ringnes Island in the Sverdrup Islands, in the territory of Nunavut in Canada, located at . It was founded to participate in a joint Canada-U.S. weather program. Isachsen operated from April 3, 1948 to September 19, 1978.
In 1956, a government plan was scrapped to resettle Inuit people at several high arctic locations, which included Isachsen, Alert, Eureka, and Mould Bay. If the plan had proceeded, a permanent town would have been established at Isachsen. On October 31, 1971 the United States withdrew its participation at the site, and this led to its 1978 decommissioning. An automated weather station was placed at the site in 1989, linked by satellite. Isachsen is uninhabited.
