The following is a list of the lieutenant governors of New Brunswick. Though the present day office of the lieutenant governor in New Brunswick came into being only upon the province's entry into Canadian Confederation in 1867, the post is a continuation from the first governorship of New Brunswick in 1786. This list also includes a number of the individuals, primarily Chief Justices, who acted briefly as de facto interim lieutenant governors for short periods of time. For instance, when lieutenant governors died in office. These individuals were generally not sworn in as actual lieutenant governors, they merely temporarily assumed the responsibilities of the Lieutenant Governor until a new person was appointed to the position. These "interim" lieutenant governors are identified in the list below as "admin".
| Portrait | Name | Term of office | Monarch | Premier | ||
|---|---|---|---|---|---|---|
| 1 | Thomas Carleton | 1786 | 1817 | George III | None | |
| – | Gabriel George Ludlow | 1805 | 1808 | |||
| – | Edward Winslow | 1808 | 1808 | |||
| – | Sir Martin Hunter | 1808 | 1808 | |||
| – | George Johnstone | 1808 | 1809 | |||
| – | Sir Martin Hunter | 1809 | 1811 | |||
| – | William Balfour | 1811 | 1811 | |||
| – | Sir Martin Hunter | 1811 | 1812 | |||
| – | George Stracey Smyth | 1812 | 1813 | |||
| – | Sir Thomas Saumarez | 1813 | 1814 | |||
| – | George Stracey Smyth | 1814 | 1816 | |||
| – | Harris W. Hailes | 1816 | 1817 | |||
| 2 | George Stracey Smyth | 1817 | 1823 | |||
| George IV | ||||||
| 3 | Sir Howard Douglas 3rd Baronet | 1824 | 1831 | |||
| William IV | ||||||
| 4 | Sir Archibald Campbell 1st Baronet | 1831 | 1837 | |||
| 5 | Sir John Harvey | 1837 | 1841 | |||
| Victoria | ||||||
| 6 | Sir William Colebrooke | 1841 | 1848 | |||
| 7 | Sir Edmund Walker Head 8th Baronet | 1848 | 1854 | |||
| 8 | John Manners-Sutton | 1854 | 1861 | |||
| Charles Fisher | ||||||
| John Hamilton Gray | ||||||
| Charles Fisher | ||||||
| Samuel Leonard Tilley | ||||||
| 9 | Arthur Hamilton-Gordon | 1861 | 1866 | |||
| Albert James Smith | ||||||
| Peter Mitchell | ||||||