K
| Name | Type | Class | Dates | Notes |
|---|---|---|---|---|
| HMAS K9 | Submarine | K VIII | 1943–1944 | From the Netherlands |
| HMAS Kalgoorlie | Corvette | Bathurst | 1942–1946 | |
| HMAS Kangaroo | Boom defence vessel | Bar | 1940–1955 | |
| HMAS Kanimbla | Landing ship | 1943–1949 | from and to Royal Navy | |
| HMAS Kanimbla | Landing ship | Kanimbla | 1994-2011 | from US Navy, ex-USS Saginaw |
| HMAS Kapunda | Corvette | Bathurst | 1942–1961 | |
| HMAS Kara Kara | Auxiliary boom defense vessel | Auxiliary vessel | 1941–1972 | Sold for scrap in 1972, hulk sunk as target off Jervis Bay in 1973 |
| HMAS Karangi | Boom defense vessel | Bar | ||
| HMAS Katoomba | Corvette | Bathurst | 1940–1957 | |
| Kelat | Coal hulk | Auxiliary vessel | 1941–1942 | Sunk after air raid in Darwin |
| HMAS Kianga | Auxiliary minesweeper | |||
| HMAS Kiama | Corvette | Bathurst | 1942–1952 | to New Zealand |
| HMAS Kimbla | Trials ship | 1956–1985 | ||
| HMAS Kinchela | Net Layer | |||
| HMAS King Bay | Examination vessel | 1940–1946 | ||
| HMAS Koala | Boom defense vessel | Bar | ||
| HMAS Kookaburra | Boom defence vessel | Net | 1939–1958 | |
| HMAS Koolonga | Collier and supply ship | Auxiliary vessel | 1914–1915 | |
| HMAS Koompartoo | Auxiliary boom defence vessel | Auxiliary vessel | ||
| HMAS Koopa | Training Depot ship and Fairmile Motor Launch Depot ship | Auxiliary vessel | 1942–1947 | returned to owners in 1947 |
| HMAS Kooronga | Tug/Training ship | Auxiliary vessel | 1924–1948 | sold to private owners and converted into a schooner |
| HMAS Korowa | Auxiliary minesweeper | |||
| Koraaga | Auxiliary minesweeper | Auxiliary vessel | 1917–1918 | Returned to owner |
| MSA Koraaga | Auxiliary minesweeper | 1989–2000 | ||
| HMAS Kuramia | Auxiliary netlayer | |||
| HMAS Kuru | Patrol boat | 1941–1943 | From Northern Territory Patrol Service | |
| HMAS Kurumba | Oiler | 1919–1947 | from Royal Navy | |
| HMAS Kuttabul | Accommodation ship | Auxiliary vessel | 1940–1942 | sunk on 31 May 1942 in Sydney Harbour |
| HMAS Kybra | Auxiliary anti-submarine vessel | Auxiliary vessel |
Read more about this topic: List Of Ships Of The Royal Australian Navy, Past Ships