| Karkar Island | |
|---|---|
 Crater of Mount Uluman | |
| Highest point | |
| Prominence | 1,839 m (6,033 ft) |
| Coordinates | 4°39′S 145°58′E / 4.650°S 145.967°E |
| Geography | |
  Karkar Island Bismarck Sea, north of Papua New Guinea | |
| Geology | |
| Mountain type | Stratovolcano |
| Last eruption | March 2014 |
Karkar Island is an oval-shaped volcanic island located in the Bismarck Sea, about 30 kilometres (19 mi) off the north coast of mainland Papua New Guinea in Madang Province, from which it is separated by the Isumrud Strait. The island is about 25 km (16 mi) in length and 19 km (12 mi) in width. In the centre is an active volcano with two nested calderas.