Henri Vannérus (29 July 1833 – 16 May 1921) was a Luxembourgian politician, jurist, and diplomat. An Orangist, he twice served as Minister for Justice, in the governments of Victor de Tornaco (1864 – 1866) and Emmanuel Servais (1867 – 1874). Vannérus was later a member of the Council of State from 1874 until his death in 1921, and served as President for two spells totalling twenty years (1888 – 1889, 1895 – 1914). After his second stint as President of the Council of State, he became Luxembourg's chargé d'affaires in Paris. Throughout this period, he formed a close connection with Paul Eyschen and Mathias Mongenast, thanks in no small part to all being from the town of Diekirch.