This is a list of premiers of New South Wales by time in office. The basis of the list is the inclusive number of days between dates.
Rank by time in office
{ |class="wikitable" style="font-size: 90%" ! ! Rank ! No. ! Officeholder ! Portrait ! Party ! District ! Assumedoffice ! Leftoffice ! Time in office(term) ! Time in office(total) ! Electionwins |- bgcolor=#FFFACD align="center" | rowspan=5 | | rowspan=5 | 1. | rowspan=5 | 7th | rowspan=5 | Sir Henry Parkes | rowspan=5 | | rowspan=3 | Liberalism | rowspan=5 |MLA for East SydneyCanterburyTenterfield | 14 May 1872 | 8 February 1875 | | rowspan=5 | 11 years, 278 days | rowspan=5 | 1872 188018821887 1889 |- bgcolor=#FFFACD align="center" | 22 March 1877 | 16 August 1877 | days |- bgcolor=#FFFACD align="center" | 21 December 1878 | 4 January 1883 | |- bgcolor=#FFFACD align="center" | rowspan=2 | Free Trade | 25 January 1887 | 16 January 1889 | |- bgcolor=#FFFACD align="center" | 8 March 1889 | 23 October 1891 | |- bgcolor="lightpink" align="center" | | | 2. | 39th | Bob Carr | | Labor | MLA for Maroubra | 4 April 1995 | 3 August 2005 | | | 1995 19992003 |- bgcolor="lightpink" align="center" | | | 3. | 35th | Neville Wran | | Labor | MLA for Bass Hill | 14 May 1976 | 4 July 1986 | | | 1976 197819811984 |- bgcolor="lavender" align="center" | | | 4. | 32nd | Sir Robert Askin | | Liberal | MLA for CollaroyPittwater | 13 May 1965 | 3 January 1975 | | | 1965 196819711973 |- bgcolor="lightpink" align="center" | | | 5. | 29th | Joseph Cahill | | Labor | MLA for Cook's River | 2 April 1952 | 22 October 1959 | | | 1953 19561959 |- bgcolor=#BDEDFF align="center" | | | 6. | 25th | Sir Bertram Stevens | | United Australia | MLA for Croydon | 16 May 1932 | 5 August 1939 | | | 1932 19351938 |- bgcolor=#DCDCDC align="center" | rowspan=5 | | rowspan=5 | 7. | rowspan=5 | 2nd | rowspan=5 | Sir Charles Cowper | rowspan=5 | | rowspan=5 | No Party Alignment | rowspan=4 | MLA for Sydney CityEast Sydney | 26 August 1856 | 2 October 1856 | days | rowspan=5 | 6 years, 352 days | rowspan=5 | 1865 |- bgcolor=#DCDCDC align="center" | 7 September 1857 | 26 October 1859 | |- bgcolor=#DCDCDC align="center" | 10 January 1861 | 15 October 1863 | |- bgcolor=#DCDCDC align="center" | 3 February 1865 | 21 January 1866 | days |- bgcolor=#DCDCDC align="center" | MLA for Liverpool Plains | 13 January 1870 | 15 December 1870 | days |- bgcolor=#DCDCDC align="center" | | | rowspan=2 | 8. | rowspan=2 | 19th | rowspan=2 | William Holman | rowspan=2 | | bgcolor="lightpink" | Labor | rowspan=2 | MLA for Cootamundra | bgcolor="lightpink" | 30 June 1913 | bgcolor="lightpink" | 15 November 1916 | bgcolor="lightpink" | | rowspan=2 | 6 years, 287 days | rowspan=2 | 1913 1917 |- bgcolor=#BDEDFF align="center" | | | Nationalist | 15 November 1916 | 12 April 1920 | |- bgcolor="lightpink" align="center" | | | 9. | 27th | Sir William McKell | | Labor | MLA for Redfern | 16 May 1941 | 6 February 1947 | | | 1941 1944 |- bgcolor=#DCDCDC align="center" | rowspan=3 | | rowspan=3 | 10. | rowspan=3 | 6th | rowspan=3 | Sir James Martin | rowspan=3 | | rowspan=3 | No Party Alignment | rowspan=3 | MLA for TumutLachlanEast Sydney | 16 October 1863 | 2 February 1865 | days | rowspan=3 | 5 years, 171 days | rowspan=3 | |- bgcolor=#DCDCDC align="center" | 22 January 1866 | 26 October 1868 | |- bgcolor=#DCDCDC align="center" | 16 December 1870 | 13 May 1872 | |- bgcolor="lightpink" align="center" | | | 11. | 28th | James McGirr | | Labor | MLA for BankstownLiverpool | 6 February 1947 | 2 April 1952 | | | 1947 1950 |- bgcolor=#FFFACD align="center" | | | 12. | 12th | Sir George Reid | | Free Trade | MLA for Sydney-King | 3 August 1894 | 13 September 1899 | | | 1894 18951898 |- bgcolor="lavender" align="center" | | | 13. | 45th | Gladys Berejiklian | | Liberal | MLA for Willoughby | 23 January 2017 | 5 October 2021 | | | 2019 |- bgcolor=#DCDCDC align="center" | rowspan=5 | | rowspan=5 | 14. | rowspan=5 | 5th | rowspan=5 | Sir John Robertson | rowspan=5 | | rowspan=5 | No Party Alignment | MLA for Upper Hunter | 9 March 1860 | 9 January 1861 | days | rowspan=5 | 4 years, 242 days | rowspan=5 | 1860 18741877 |- bgcolor=#DCDCDC align="center" | rowspan=2 | MLA for ClarenceWest Sydney | 27 October 1868 | 12 January 1870 | |- bgcolor=#DCDCDC align="center" | 9 February 1875 | 21 March 1877 | |- bgcolor=#DCDCDC align="center" | MLA for East Macquarie | 17 August 1877 | 17 December 1877 | days |- bgcolor=#DCDCDC align="center" | MLA for Mudgee | 22 December 1885 | 22 February 1886 | days |- bgcolor="lightpink" align="center" | | | 15. | 30th | Bob Heffron | | Labor | MLA for Maroubra | 23 October 1959 | 30 April 1964 | | | 1962 |- bgcolor="lavender" align="center" | | | 16.