Rats of Tobruk Memorial, War memorial monument on Anzac Parade, Canberra, Australia

The Rats of Tobruk Memorial is a monument on Anzac Parade in Canberra that honors soldiers who defended a port in Libya in 1941. A central obelisk is surrounded by walls that recreate the fortifications of the besieged city.

The German siege of Tobruk began on 10 April 1941; most Australian forces were relieved by October 1941, but the town stayed contested until the Allied victory at El Alamein in 1942. The defence lengthened German supply lines and diverted troops. The memorial was unveiled on 13 April 1983 by Governor-General Sir Ninian Stephen, and a time capsule was laid on 17 April 1991 by J.N. Madeley of the Rats of Tobruk Association.

The honorific "Rats of Tobruk" was given to the besieged defenders, and the memorial keeps that name alive. Its surrounding walls trace the perimeter defences of Tobruk, with the coastline and harbour at the front and defence positions at the rear, so the layout maps the siege area.

The memorial stands on Anzac Parade, the ceremonial avenue running north from Lake Burley Griffin toward the Australian War Memorial. It is an outdoor site, so it can be visited at any hour; the bronze eternal flame was installed in 1984. The surrounding walls mark the defence perimeter, with the coastline and harbour at the front and the defence positions at the rear.

The inscription stone set into the memorial is the only surviving relic of the 1941 memorial Australian soldiers built in the Tobruk War Cemetery, later destroyed; it had once served as a front step of the Tobruk Post Office. A time capsule was laid here on 17 April 1991 by J.N. Madeley, Federal President of the Rats of Tobruk Association, for the siege's 50th anniversary.