William II (German Wilhelm II) (25 February 1848, Stuttgart – 2 October 1921, Bebenhausen) was the fourth King of Württemberg, from 6 October 1891 until the abolition of the kingdom on 30 November 1918. He was the son of Prince Frederick of Württemberg (1808–1870) and his wife Princess Catherine Frederica of Württemberg (1821–1898), daughter of King William I of Württemberg (1781–1864); his parents were first cousins.