List of Prime Ministers of New Zealand by age Overview Overview

| _ | Prime_Minister | Date_of_birth | Start_date_of_first_term | Age_at_beginning_of_first_term | End_date_of_final_term | Total_time_in_office | Date_of_death | Lifespan |
|---|---|---|---|---|---|---|---|---|
| 15 | Seddon, Richard Richard Seddon | 1845-06-22 22 June 1845 | 27April1893 | 47-309 47years, 309days | 10June1906 | 04,791 days | 1906-06-10 10 June 1906 | days (60years, 353days) |
| 16 | Hall-Jones, William William Hall-Jones | 1851-01-16 16 January 1851 | 10June1906 | 55-145 55years, 145days | 6August1906 | 00,057 days | 1936-06-19 19 June 1936 | days (85years, 155days) |
| 17 | Ward, Joseph Joseph Ward | 1856-04-26 26 April 1856 | 6August1906 | 50-102 50years, 102days | 28May1930 | 02,595 days | 1930-07-08 8 July 1930 | days (74years, 73days) |
| 18 | Mackenzie, Thomas Thomas Mackenzie | 1854-03-10 10 March 1854 | 28March1912 | 58-018 58years, 18days | 10July1912 | 00,104 days | 1930-02-14 14 February 1930 | days (75years, 341days) |
| 19 | Massey, William William Massey | 1856-03-26 26 March 1856 | 10July1912 | 56-106 56years, 106days | 10May1925 | 04,687 days | 1925-05-10 10 May 1925 | days (69years, 45days) |