List of Premiers of New South Wales by time in office Rank by time in office Rank by time in office

| Rank_ | Premier_ | Party_ | Assumed_Office_ | Left_Office_ | TOTAL_Time_in_Office_ |
|---|---|---|---|---|---|
| 3. | Neville Wran | Labor | 14 May 1976 | 4 July 1986 | 10years, 51days |
| 4. | Sir Robert Askin | Liberal | 13 May 1965 | 3 January 1975 | 9years, 235days |
| 5. | Joseph Cahill | Labor | 2 April 1952 | 22 October 1959 | 7years, 204days |
| 6. | Sir Bertram Stevens | United Australia | 16 May 1932 | 4 August 1939 | 7years, 80days |
| 7. | Sir Charles Cowper | Liberalism | 26 August 1856 | 2 October 1856 | 6 years, 352 days |
| 7. | Sir Charles Cowper | Liberalism | 7 September 1857 | 26 October 1859 | 6 years, 352 days |
| 7. | Sir Charles Cowper | Liberalism | 10 January 1861 | 15 October 1863 | 6 years, 352 days |
| 7. | Sir Charles Cowper | Liberalism | 3 February 1865 | 21 January 1866 | 6 years, 352 days |