Duncraig is a northern suburb of Perth, the capital city of Western Australia, and is located 16 kilometres (10 mi) north of Perth's central business district (CBD) between Marmion Avenue and Mitchell Freeway. Its local government area is the City of Joondalup.

Marmion Avenue is a 40-kilometre (25 mi) arterial road in the northern coastal suburbs of Perth, Western Australia, linking Trigg in the south with Yanchep in the north. It forms part of State Route 71 along with West Coast Highway, which it joins onto at its southern terminus.