Port Adelaide is a single-member electoral district for the South Australian House of Assembly.

In addition to its namesake suburb of Port Adelaide, the district includes the suburbs of Birkenhead, Bolivar, Cavan, Dry Creek, Ethelton, Exeter, Garden Island, Gepps Cross, Gillman, Glanville, Globe Derby Park, Largs Bay, Largs North, New Port, North Haven, Osborne, Ottoway, Outer Harbor, Peterhead, Semaphore, Semaphore South, St Kilda, Taperoo, Torrens Island, Wingfield, as well as part of Rosewater.

Port Adelaide was the name of an electoral district of the unicameral South Australian Legislative Council from 1851 until its abolition in 1857.

The seat was recreated in 2002, essentially as a reconfigured version of Hart (which was itself created in 1993 as a replacement for Semaphore).

The member for Hart, deputy premier and state treasurer Kevin Foley, followed most of his constituents into the recreated seat and held it easily.