Dimitrie Gusti (Romanian pronunciation: [diˈmitri.e ˈɡusti]; 13 February 1880 – 30 October 1955) was a Romanian sociologist, ethnologist, historian, and voluntarist philosopher; a professor at the University of Iaşi and the University of Bucharest, he served as Romania's Minister of Education in 1932-1933. Gusti was elected a member of the Romanian Academy in 1919, and was its President between 1944 and 1946. He was the main contributor to the creation of a new Romanian school of sociology.
He was a prominent member of the Peasants' Party, and later of the National Peasants' Party into which the former had merged.
Born in Iaşi, he began studying Letters at the University of Iaşi before moving on to the Universität unter den Linden and the University of Leipzig, where he studied and completed a doctorate in Philosophy (1904). In 1905, he began the study of Sociology, Law, and Political economy at the Universität unter den Linden.
Gusti was appointed to the Department of Ancient History, Ethics and Sociology of the University of Iaşi in 1910, and was one of the main contributors to the creation of a new Romanian school of sociology. He moved to Bucharest in 1920, and began work as a professor at the University of Bucharest, in the Department of Sociology, Ethics, Politics and Aesthetics of the latter's Faculty of Letters and Philosophy. His lectures became a center of interest inside the academic community, and he attracted students with diverse backgrounds and political convictions (the far right Mircea Vulcănescu, the communist Miron Constantinescu, the Austromarxist Henri H. Stahl, and the left-wing artist Lena Constante).