Reginald John David "Spot" Turnbull (21 February 1908 – 17 July 2006) was an Australian politician. He was a member of the Tasmanian House of Assembly from 1946 to 1961 (1946–1959 for the Labor Party, 1959–1961 as an Independent), then a Senator for Tasmania from 1962 until 1974. Though he was elected Senator each time as an Independent, he briefly served as leader of the Australia Party from August 1969 to January 1970. Turnbull also served as Mayor of Launceston from 1964 to 1965.