Lodewijk De Raet (Dutch pronunciation: [ˈloːdəʋɛiɡ də ˈraːt];[a] Brussels, 17 February 1870 – Forest, 24 November 1914) was a Flemish economist and politician.
He was co-founder of the Vlaamsche volkspartij (1892), and was a proponent of the use of Dutch instead of French at the University of Ghent in Flanders (north part of Belgium).
Together with August Vermeylen he started the illustrated magazine Jong Vlaanderen (E: Young Flanders) and he had been involved in the establishment of De Vlaamsche Wacht (E: Flemish guard), an organization of Flemings in Brussels.
In the meantime he studied, thanks to the support of Emiel Blauwaert, a friend of its deceased father, at the École polytechnique of the Universite Libre de Bruxelles (ULB).
On 31 March 1911, the bill for the use of Flemish at the University of Ghent, was submitted to the Belgian parliament by Frans Van Cauwelaert, Louis Franck and Camille Huysmans.