| Year | Prime Minister | Party |
| 1856 | |
| 1856, 1861-1862, 1865-1872, 1873 | |
| 1856-1861, 1865-1869, 1872 | |
| 1862-1863 | |
| 1863-1864, 1882-1883 | |
| 1864-1865 | |
| 1872-1873 | |
| 1873-1875, 1876 | |
| 1875-1876 | |
| 1876-1877, 1883-1884, 1884, 1887-1891 | |
| 1877-1879 | |
| 1879-1882 | |
| 1884, 1884-1887 | |
| 1891-1893 | |
| 1893-1906 | |
| 1906 | |
| 1906-1912, 1928-1930 | |
| 1912 | |
| 1912-1925 | |
| | Year | Prime Minister | Party |
| 1925 | |
| 1925-1928 | |
| 1930-1935 | |
| 1935-1940 | |
| 1949-1957 | |
| 1957, 1960-1972 | |
| 1957-1960 | |
| 1972 | |
| 1972-1974 | |
| 1974-1975 | |
| 1975-1984 | |
| 1984-1989 | |
| 1989-1990 | |
| 1990 | |
| 1990-1997 | |
| 1997-1999 | |
| 1999-2008 | |
| 2008- | |
|