| Order: | Mayor of Invercargill |
| Term Start1: | 1875 |
| Term End1: | 1876 |
| Predecessor1: | Thomas Pratt |
| Successor1: | John Cuthbertson |
| Term Start2: | 1889 |
| Term End2: | 1890 |
| Predecessor2: | Thomas Fleming |
| Successor2: | William Horatio Hall |
| Birth Date: | 1832 |
| Birth Place: | Thornhill, Perthshire, Scotland |
John Walker Mitchell (1832 – 23 July 1914) was a Scottish-born New Zealand politician. He immigrated to New Zealand from Australia in 1862. He was a losing candidate in the 1871 Invercargill mayoral election and 1895 Invercargill mayoral election. He was twice mayor of Invercargill (1875–1876, 1889–1890) and served as Councillor for two terms (1873–1875, 1887–1889).