Age at Total Prime Date of Start date beginning End date time Date of SNo Lifespan Minister birth of (first) term of (first) of (final) term in death term office 25,920 days Edmund 18 January 51 years, 996 7 January 1 1 January 1901 24 September 1903 (70 years, Barton 1849 348 days days 1920 354 days) 23,074 days Alfred 3 August 47 years, 1,747 7 October 2 24 September 1903 29 April 1910 (63 years, Deakin 1856 52 days days 1919 65 days) 18 27,251 days Chris 9 April 37 years, 113 3 27 April 1904 18 August 1904 November (74 years, Watson 1867 18 days days 1941 223 days) 12 26,861 days George 25 February 59 years, 321 4 18 August 1904 5 July 1905 September (73 years, Reid 1845 175 days days 1918 199 days) 22 24,160 days Andrew 29 August 46 years, 1,758 5 13 November 1908 27 October 1915 October (66 years, Fisher 1862 76 days days 1928 54 days) 31,645 days Joseph 7 December 52 years, 450 30 July 6 24 June 1913 17 September 1914 (86 years, Cook 1860 199 days days 1947 235 days) 25 28 32,905 days Billy 53 years, 2,662 7 September 27 October 1915 9 February 1923 October (90 years, Hughes 32 days days 1862 1952 33 days) 30,812 days Stanley 15 April 39 years, 2,447 25 August 8 9 February 1923 22 October 1929 (84 years, Bruce 1883 300 days days 1967 132 days) 18 28 27,890 days James 53 years, 806 9 September 22 October 1929 6 January 1932 January (76 years, Scullin 34 days days 1876 1953 132 days) 15 21,753 days Joseph 52 years, 2,648 7 April 10 September 6 January 1932 7 April 1939 (59 years, Lyons 113 days days 1939 1879 204 days) 20 29,718 days 8 August 58 years, 19 11 7 April 1939 26 April 1939 December (81 years, 1880 242 days days 1961 134 days) 20 30,461 days Robert 44 years, 6,735 15 May 12 December 26 April 1939 26 January 1966 (83 years, Menzies 127 days days 1978 1894 146 days) 28,862 days Arthur 13 April 47 years, 39 21 April 13 29 August 1941 7 October 1941 (79 years, Fadden 1894 138 days days 1973 8 days) 22,092 days 8 January 56 years, 1,367 5 July 14 7 October 1941 5 (60 years, 1885 272 days days 1945 178 days) 28 33,796 days 18 July 54 years, 7 15 Frank Forde 6 July 1945 13 July 1945 January (92 years, 1890 353 days days 1983 194 days) 22 24,004 days 59 years, 1,620 13 June 16 September 13 July 1945 19 December 1949 (65 years, 294 days days 1951 1885 264 days) 17 21,683 days 5 August 57 years, 690 17 26 January 1966 19 December 1967 December (59 years, 1908 174 days days 1967 134 days) 20 29,456 days John 29 March 67 years, 22 18 19 December 1967 10 January 1968 November (80 years, McEwen 1900 265 days days 1980 236 days) 33,125 days John 9 September 56 years, 1,155 19 May 19 10 January 1968 10 March 1971 (90 years, Gorton 1911 123 days days 2002 252 days) 29,257 days William 23 February 63 years, 636 31 March 20 10 March 1971 5 December 1972 (80 years, McMahon 1908 15 days days 1988 37 days) 35,645 days Gough 11 July 56 years, 1,071 21 5 December 1972 11 November 1975 (97 years, Whitlam 1916 147 days days 216 days) 30,583 days Malcolm 21 May 45 years, 2,677 22 11 November 1975 11 March 1983 (83 years, Fraser 1930 174 days days 267 days) 30,746 days 9 December 53 years, 3,206 23 11 March 1983 20 December 1991 (84 years, 1929 92 days days 65 days) 25,593 days Paul 18 January 47 years, 1,543 24 20 December 1991 11 March 1996 (70 years, Keating 1944 336 days days 25 days) 27,230 days John 26 July 56 years, 4,284 25 11 March 1996 3 December 2007 (74 years, Howard 1939 229 days days 201 days) 21 20,598 days 50 years, 1,164 26 September 3 December 2007 18 September 2013 (56 years, 73 days days 1957 144 days) 29 19,129 days Julia 48 years, 1,098 27 September 24 June 2010 26 June 2013 (52 years, Gillard 268 days days 1961 136 days) 20,554 days Tony 4 November 55 years, 231 28 26 June 2013 Incumbent (56 years, Abbott 1957 234 days days 100 days)

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Original source : en.wikipedia.org/wiki/List_of_Australian_Prime_Ministers_by_age