HMAS Sydney II Memorial, War memorial in Mount Scott, Geraldton, Australia.

HMAS Sydney II Memorial is a war memorial in Mount Scott, Geraldton, built to honor a naval vessel and its crew. The centerpiece features a silver dome made of gull sculptures forming a filigree canopy above seven pillars, each representing an Australian territory.

HMAS Sydney II sank on 19 November 1941 after a battle with the German raider Kormoran off Western Australia; all 645 aboard died, the largest loss of life in the history of the Royal Australian Navy. The wreck was located in 2008, and the memorial at Mount Scott was dedicated on 18 November 2001.

The Wall of Remembrance displays the names of all military personnel and civilian canteen staff members who died in the sinking. Walking past these inscriptions, visitors connect with the individual stories behind this national loss.

The memorial grounds offer accessible pathways and viewing areas where visitors can take in the entire site comfortably. Recently built restroom facilities match the site's architectural design and serve all visitors.

The memorial's design follows the path of the ship's final voyage: a bronze chart of the Indian Ocean is set into the ground, and the dome of 645 seagulls carries one bird for each of the 645 men lost. The ship's bell, recovered from the wreck, hangs at the site.