Karijini National Park is a National Park centred in the Hamersley Ranges of the Pilbara region in northwestern Western Australia (Australia). It is just north of the Tropic of Capricorn, approximately 1,055 kilometres (656 mi) from the State's capital city, Perth. It was formerly known as Hamersley National Park.
At 627,442 hectares (1,550,440 acres), it is the second largest national park in Western Australia (Karlamilyi National Park is larger).
The park is physically split into a northern and a southern half by a corridor containing the Hamersley & Robe River railway and the Marandoo iron ore mine.
The park is served by the Solomon Airport, located 15 kilometres (9.3 mi) westwards.
A party led by explorer F.T. Gregory explored the area in 1861. He named the Hamersley Range, on which the park is centred, after his friend Edward Hamersley.