Colonel William Baring du Pré DL (5 April 1875 – 23 August 1946) was a British Conservative Party politician.
Du Pré was educated at Winchester College and the RMA and was originally commissioned into the King's Royal Rifle Corps, but served in the Boer War with 47th Company, Imperial Yeomanry. He was captured in the "Yeomanry Disaster" at Lindley in May 1900 and held at Barberton prisoner of war camp. He later commanded the 2/1st Leicestershire Royal Horse Artillery (Territorials) and served on the Western Front 1915-18.
He was appointed High Sheriff of Buckinghamshire and deputy lieutenant of the county in 1911 (Coronation Medal, 1911) and was a JP for Bucks. Du Pré was elected as MP for Wycombe at a by-election in 1914, when the Conservative MP Charles Cripps was elevated to the peerage as Baron Parmoor.
Du Pré was re-elected at the 1918 general election as a Coalition Conservative, but faced a strong challenge at the 1922 general election from the Liberal candidate Lady Terrington. He held his seat with a majority of 4,473, but in December of the following year, at the 1923 general election, Lady Terrington took the seat with a majority of 1,682. Du Pré was a strong opponent of the women's rights advocated by Terrington, so his defeat was welcomed by women's groups.