Leslie Frank Louis "Les" Diplock CMG (16 September 1899 – 6 November 1983) was an Australian politician.
He was elected to the seat of Condamine in the Legislative Assembly of Queensland in 1953 as a Labor Party candidate.
[1] Diplock was appointed minister for public instruction in 1956, and his ministry was chiefly remembered for a controversial bill providing for a government appointee to head an appointments and promotions repeal board at the University of Queensland; the bill was repealed when the Coalition won government in 1957.
During the Labor split of that year, Diplock sided with his leader Vince Gair in splitting away to form the Queensland Labor Party (QLP), and he retained Condamine in that year's election.
He transferred to Aubigny in 1960, defeating the sitting Country Party member Walter Sparkes, but by 1963 Diplock was the QLP's sole parliamentary representative.