The Hon. William Douglas-Home (3 June 1912 – 28 September 1992) was a British dramatist and politician.
Douglas-Home was the third son of The 13th Earl of Home and Lady Lilian Lambton, daughter of The 4th Earl of Durham. His eldest brother was Sir Alec Douglas-Home, Prime Minister, 1963-64.
He was educated at Eton College and New College, Oxford where he read History. His first play, Murder in Pupil Room, was performed by his classmates at Eton in 1926 when he was only fourteen.
On 26 July 1951, he married the equally aristocratic the Hon. Rachel Brand (who later inherited the barony of Dacre), the daughter of Thomas Brand, 4th Viscount Hampden & 26th Baron Dacre and Leila Emily Seely. They had four children.
During the Second World War, Douglas-Home contested three parliamentary by-elections as an independent candidate opposed to Winston Churchill's war aim of an unconditional surrender by Germany. The political parties in the wartime Coalition Government had agreed not to contest by-elections when a vacancy arose in a seat held by the other coalition parties. At the Glasgow Cathcart by-election in April 1942, he won 21% of the votes, and at Windsor in June 1942, he won 42%. In April 1944, he came a poor third at the Clay Cross by-election, losing his deposit.