Cape York Peninsula is a peninsula located in Far North Queensland, Australia. It is the largest wilderness in northern Australia. The land is mostly flat and about half of the area is used for grazing cattle. The relatively undisturbed eucalyptus-wooded savannahs, tropical rainforests and other types of habitat are now recognised and preserved for their global environmental significance. Although much of the peninsula remains pristine, with a diverse repertoire of endemic flora and fauna, some of its wildlife may be threatened by industry and overgrazing as well as introduced species and weeds.

A peninsula is a landform that extends from a mainland and is surrounded by water on most sides. Peninsulas exist on all continents. The largest peninsula in the world is the Arabian Peninsula.