Wairau was a parliamentary electorate in the Marlborough Region of New Zealand, from 1853 to 1938.
Wairau was one of the original electorates for the first general election in 1853.
The 1896 general election was contested by the incumbent Thomas Buick and Charles H Mills, who received 2014 and 2072 votes, respectively. Mills thus succeeded Buick in Wairau.[1]
The electorate was represented by thirteen Members of Parliament:[2]
| Election | Winner | |
| 1853 election | Frederick Weld (Independent) | |
| 1855 election | William Wells (Independent) | |
| 1858 by-election | Frederick Weld (2nd period; Independent) | |
| 1861 election | William Henry Eyes (Independent) | |
| 1866 election | ||
| 1871 election | ||
| 1872 by-election | Arthur Seymour (Independent) | |
| 1875 by-election | Joseph Ward [3] (Independent) | |
| 1876 election | Arthur Seymour (2nd period; Independent) | |
| 1879 election | ||
| 1881 election | Henry Dodson [4] (Independent) | |
| 1884 election | ||
| 1887 election | ||
| 1890 election | Thomas Buick (Liberal) | |
| 1893 election | ||
| 1896 election | Charles H Mills (Liberal) | |
| 1899 election | ||
| 1902 election | ||
| 1905 election | ||
| 1908 election | John Duncan (Reform) | |
| 1911 election | Richard McCallum (Liberal) | |
| 1914 election | ||
| 1919 election | ||
| 1922 election | William Girling (Reform) | |
| 1925 election | ||
| 1928 election | Edward Healy (United) | |
| 1931 election | ||
| 1935 election | Edwin Meachen (Labour) | |