Yanchep is an outer coastal suburb of Perth, Western Australia, 56 kilometres (35 mi) north of the Perth CBD. It is a part of the City of Wanneroo local government area. Originally a small crayfishing settlement, it was developed by entrepreneur Alan Bond in the 1970s for the 1977 America's Cup. The area covers the urban centre of Yanchep as well as Yanchep National Park in its entirety.

Yanchep is a national park in Western Australia, 42 kilometres (26 mi) north of Perth adjacent to the locality of the same name Yanchep.