Dunstan was a parliamentary electorate in the Otago region of New Zealand, from 1871 to 1890.
The Dunstan electorate was created in 1871 for the 5th Parliament. The first elected representative was Thomas Luther Shepherd, who won the 1871 general election. He retired at the end of the term in December 1875. Vincent Pyke succeeded him in 1876 and held the electorate until its abolition in 1890.
Dunstan was represented by two MPs:
Key
| width=125 | Election | width=175 colspan=2 | Winner |
| 1871 election | width=5 rowspan=1 bgcolor= | Thomas Luther Shepherd | |
| 1875 election | Vincent Pyke | ||
| 1879 election | |||
| 1881 election | |||
| 1884 election | |||
| 1887 election |