Thomas Douglas may refer to: Thomas Douglas, 5th Earl of Selkirk (1771–1820), founder of the Red River Colony Thomas Monteath Douglas (1787–1868), officer of the Bengal Army of the East India Company Thomas Douglas (American judge) (1790–1855), Florida Supreme Court justice Tom Douglas (born 1958), American chef, restaurateur and writer Tommy Douglas (1904–1986), premier of Saskatchewan and leader of the New Democratic Party of Canada Tommy Douglas (clarinetist) (1911–1965), American jazz clarinetist Tom Douglas (songwriter), American songwriter Tom Douglas (footballer) (1910–1943), Scottish footballer