The electorate of O'Connor covers an area of approximately 868,576 sq km from the Gibson Desert in the north to Albany in the south. The main locations include the City of Albany and the City of Kalgoorlie-Boulder, and the regional centres of Bridgetown, Collie, Denmark, Esperance, Katanning, Laverton, Leonora, Manjimup, Mount Barker, Ravensthorpe, Wagin and Warburton.

There is a variety of industries across the electorate including grain, sheep, cattle, tree farming, fishing and aquaculture, vineyards and winemaking, gold, nickel, talc and mineral sands mining, farm stays and tourism.

The electorate is named after Charles O'Connor 1843–1902, Engineer in Chief of Western Australia (appointed 1891). Charles O’Connor designed Fremantle Harbour and the pipeline which supplies the Wheatbelt and the Goldfields with water.