Rev Francis Whitmore Isitt (1843 – 11 November 1916) was a New Zealand Methodist minister, who was general secretary of the New Zealand Alliance (for prohibition) from 1900 to 1909. He was a brother of the Rev Leonard Isitt. In February 1874 he married 22-year-old Mary Campbell Purdie in Upper Kaikorai, Dunedin. One of their children, Kate Isitt, became a novelist and journalist for the Manchester Guardian newspaper. His grandson, Francis Charles Isitt, stood for Social Credit in the Timaru electorate in the 1957 election and 1960 elections.