City of Karratha: History
The City of Karratha originated as the Roebourne Road District, established on 6 January 1887. The towns of Roebourne and Cossack were excised as separate municipalities on 1 December 1887, forming the Municipality of Roebourne and Municipality of Cossack. As the region's population declined, both municipalities were re-merged into the road district in 1910: Roebourne on 11 March and Cossack on 13 August.
On 1 July 1961, it became the Shire of Roebourne under the Local Government Act 1960. On 1 July 2014, it was granted city status and renamed the City of Karratha.