(also Vogelkop), a peninsula in the northwestern part of the island of New Guinea, in Indonesia. The peninsula is about 350 km long and has a maximum width of 200 km; it is connected to the mainland by an isthmus with a width of about 20 km. In the north and east are mountains rising to an elevation of about 3,100 m at Mount Gwamongga; in the south lies a lowland. The peninsula has tropical rain forests that become quite swampy in the south. The local population engages in tropical land cultivation. There are petroleum deposits at Klamono, Mogoi, and Wasian. The port of Sorong is located on the western coast of the peninsula.