John Walker Mitchell (1832 â 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 (1875âÂÂ1876, 1889âÂÂ1890) and served as Councillor for two terms (1873âÂÂ1875, 1887âÂÂ1889).