Portal:Australia/Anniversaries/April/April 27
- 1804 – Explorer Matthew Flinders climbs Arthurs Seat, on the Mornington Peninsula in present-day Victoria.
- 1896 – Sir Henry Parkes (pictured), known as the "Father of Federation", dies in Annandale, New South Wales, at the age of 80.
- 1904 – Alfred Deakin resigns as Prime Minister of Australia due to the Protectionist Party's inability to pass legislation, and is succeeded by Chris Watson, the leader of the Labor Party.
- 1964 – Sir Garfield Barwick is appointed Chief Justice of Australia, succeeding Sir Owen Dixon.
- 1971 – Relics from the wreck of the Dutch East India Company ship Batavia are recovered off the coast of the Houtman Abrolhos in Western Australia.
- 2014 – Three former Country Liberal MPs join the Palmer United Party, becoming the party's first representatives in the Northern Territory Legislative Assembly.