William Bagot, 4th Baron Bagot

William Bagot, 4th Baron Bagot JP (19 January 1857 – 23 December 1932) was a British peer and Conservative politician.

Bagot was the eldest son of William Bagot, 3rd Baron Bagot, and his wife the Hon. Lucia Caroline Elizabeth, daughter of George Agar-Ellis, 1st Baron Dover, and was educated at Eton. He was a Lieutenant-Colonel in the Staffordshire Yeomanry and a Captain in the 3rd Staffordshire Rifle Volunteers and served as an Aide-de-Camp to the Governor General of Canada from 1876 to 1883. Bagot also held the office of Gentleman Usher of the Privy Chamber from 1885 to 1887 and was a Justice of the Peace for Derbyshire and Staffordshire. Between 1896 and 1901 he served as a Lord-in-Waiting (government whip in the House of Lords) in the Conservative administration of Lord Salisbury. He also held a commission with the Staffordshire Imperial Yeomanry during the Second Boer War, which he resigned in November 1901.

Lord Bagot married Lilian Mary, daughter of Henry May, in 1903. They had one daughter, Barbara, born 1 January 1905. He died 23 December 1932, aged 75, and was succeeded in his titles by his second cousin Gerald William Bagot, 5th Baron Bagot. Lady Bagot died 21 February 1958.