HMAS Tambar was an auxiliary minesweeper operated by the Royal Australian Navy (RAN) during World War II. Built in 1912 by the Greenock and Grangemouth Dockyard Company, Grangemouth for the North Coast Steam Navigation Company. She was sold in 1919 to the British New Guinea Development Company, in 1928 to the Tasmanian Government and later to Holyman & Sons. Tambar was requisitioned by the RAN and commissioned as an auxiliary minesweeper.