William Langham Christie (31 May 1830 – 28 November 1913) of Glyndebourne, Sussex, and Tapeley, North Devon, was a British Conservative Party politician.
He was the son of Langham Christie, who had inherited Glyndebourne, the Sussex country house now famous for its music festival, after paying off a rival family claimant.
William succeeded his father in 1861.
During the 1870s he made substantial alterations to Glyndebourne, adding a brick extension, ornate stonework and balustrading.
In 1876 he engaged architect Ewan Christian to install bay windows and add decorative brickwork to give the house its current Jacobean appearance.He was elected as the Member of Parliament (MP) for Lewes at the 1874 general election, having unsuccessfully contested the seat in 1865 and 1868.
He was the first Conservative MP to represent Lewes in the House of Commons since Henry Fitzroy had died in 1860.
Christie was re-elected in 1880, and retired from Parliament at the 1885 general election.