Which mountain is the highest island peak in the world?

Puncak Jaya is the highest island peak in the world.

Rising to 4,884 metres on New Guinea, Puncak Jaya is located in Indonesia's Central Papua province. It is the highest point in Indonesia and is often included among the Seven Summits, the highest peaks on each continent.

The mountain belongs to the Sudirman Range and is also known as Carstensz Pyramid, after Dutch explorer Jan Carstenszoon, who reported seeing the snowy summit in 1623. Its Indonesian name, Puncak Jaya, means “Victorious Peak,” while the Amungme name is Nemangkawi Ninggok.

Puncak Jaya is sometimes confused with Mauna Kea, which is taller when measured from its submarine base to its summit. That is a height-from-base comparison, not the island-peak record based on elevation above sea level. Puncak Jaya's glaciers have also shrunk markedly, and the nearby Grasberg mine is one of the world's major gold and copper mines.