Cockburn is an electoral district of the Legislative Assembly in the Australian state of Western Australia.

The district is based in Perth's south-western suburbs.

It is a coastal electorate, lying to the west of the Kwinana Freeway.

The district includes the suburbs of Cockburn Central, Atwell, Yangebup, Munster, Beeliar, Success, most of Coogee and Lake Coogee, as well as parts of South Lake.

Cockburn has been at all times held by the Labor Party.