Multi-member constituencies were abolished in the 1893 redistribution, resulting in the creation of 76 new districts, including Cobar.
[5][6] Cobar's economy was centered around copper mining,[7] and the district also included Nyngan which was established in 1883 as a stop on the Main Western railway line on its way to Bourke.
[13] Cobar was abolished in 1920, with the introduction of proportional representation,[14] and was absorbed by the expanded district of Sturt, along with Willyama to create a three-member electorate covering most of the Western Division of New South Wales.
Cobar was re-created in 1930, and comprised part of the districts of Sturt, Lachlan and Namoi, including the towns of Cobar, Bourke, Brewarrina, Byrock, Wilcannia, White Cliffs and part of Broken Hill.
[16][17] Cobar, along with Sturt were abolished as a result of the 1966 redistribution, replaced by the new district of Broken Hill, which included all of the town, and the district extended from the border with Victoria on the Murray River to the Queensland border in the north, including the towns of Wentworth and Wilcannia.