Adak may refer to:
Places
- Adak Island, one of the Aleutian Islands
- Adak, Alaska, a town on the above island
- Adak Airport, airport serving the town
- Adak Army Airfield, original name of the airport (1942–c.1943)
- Davis Army Airfield, a later name of the airport (c.1943–1950)
- Naval Air Facility Adak, a later name of the airport (1950–1997)
- Adak Region School District serving the town
- Adak, Sweden, a locality and small town in Västerbotten<!--OK 2nd link-->, Sweden
- Adak, Kemaliye, a village
People
- Runggye Adak, Tibetan activist
- Subrata Adak, Indian biochemist
- Ramdas Adak, 17th-century Bengali poet and author
Other uses
- Adak (album), an album by İzel
- Adak Fisheries, the exclusive fisheries operator at Adak Island
- America/Adak or Adak timezone; a time zone in Alaska
- , a U.S. Coast Guard cutter