The diocese covers the Kimberley and Pilbara regions of Western Australia.

On 10 May 1887, it was established initially as an Apostolic Vicariate of Kimberley in Western Australia, on territory split off from the then Diocese of Perth.

On 4 May 1910, it lost territory to establish the Mission sui juris of Drysdale River, which was later renamed Kalumburu.

In 1980, it regained the territory of the suppressed Mission sui juris of Kalumburu.

This article on a Roman Catholic diocese in Australia is a stub.