Rockingham is a city and primary centre in
Western Australia south-west of the Perth city
centre and south of Fremantle. Rockingham has a
beachside location at Mangles Bay, the southern
extremity of Cockburn Sound. To its north
stretches the maritime and resource-industry
installations of Kwinana and Henderson. Offshore
to the north-west is Australia's largest naval fleet
and submarine base, Garden Island, connected to
the mainland by an all-weather causeway. To the
west and south of Rockingham lies the Shoalwater
Islands Marine Park.