The official regions of Western Australia: the Kimberley is in red, the Pilbara in orange and the Gascoyne is an ochre/burnt sienna colour.
The terms North West Australia and North Western Australia is an imprecise and unofficial geographical term which has a number of different definitions and may refer to the following areas:
- north of latitude 26° south — a definition widely used in law and State government policy
- the official Kimberley, Pilbara and Gascoyne regions of Western Australia, or two or more of these.
- during the 19th century, the whole area north of the Murchison River was referred to as the North District, and during the 1860s it was officially administered by a Government Resident, Robert John Sholl, based in Roebourne.
