Avon Valley is a national park in Western Australia, 47 kilometres northeast of Perth. It was named after the Avon River, which flows through it. The area is an undulating plateau with the sides of the valley steeply sloping back to the river approximately 200 metres (660 ft) below. The area contains granite outcrops and a mix of soil types including loams, gravels and lateritic sands.

The Avon River is a river in Western Australia. A tributary of the Swan River, the Avon flows 240 kilometres (150 mi) from source to mouth, with a catchment area of 125,000 square kilometres (48,000 sq mi).