Yapen is an island of western New Guinea

Western New Guinea

West Papua informally refers to the Indonesian western half of the island of New Guinea and other smaller islands to its west. The region is officially administered as two provinces: Papua and West Papua. The eastern half of New Guinea is Papua New Guinea.The population of approximately 3 million...

, Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

. The Yapen Strait separates Yapen and the Biak Islands to the north. It is in Cenderawasih Bay

Cenderawasih Bay

Cenderawasih Bay , also Teluk Sarera , formerly Geelvink Bay is a large bay in northern Province of Papua and West Papua, New Guinea, Indonesia, at . The Dutch name comes after a Dutch ship and family called Geelvinck...

. To the west is Mios Num Strait between it and Mios Num

Mios Num

Mios Num is an island of western New Guinea, Indonesia, just west of Yapen. The Mios Num Strait separates it from Yapen. It is in Cenderawasih Bay. Numfoor and Biak are to the north, with Aruri Strait in between....

 Island, and the east Kurudu Island. The southeast are the Amboi Islands

Amboi Islands

The Ambai Islands are an island group of small scattered islands off the southern coast of Yapen Island, Cenderawasih Bay, eastern Indonesia in the Cenderawasih Bay off the northern coast of New Guinea. To the west are the Kuran Islands...

 and the southwest are the Kuran Islands

Kuran Islands

The Kuran Islands are an island group of small scattered islands off the southwestern coast of Yapen Island, Cenderawasih Bay, eastern Indonesia off the northern coast of New Guinea. To the east are the Amboi Islands....

. It is populated with communities of Yobi, Randowaya, Serui, and Ansus. Its highest point is 1,496 m.