HMS Dunoon was a Hunt class minesweeper of the Royal Navy from World War I. In November 1939 she was sweeping for mines around Malta. The following month she was recalled to England, stopping at Gibraltar for fuel. She then worked in the North Sea as part of the 4th Minesweeping Flotilla, based at Great Yarmouth. In April 1940 she struck a mine at Smith's Knoll near Great Yarmouth and sank with the loss of 3 officers and 23 ratings.