Widmann is a German surname. Notable people with the surname include:
Albert Widmann (1912–1986), German chemist and SS officer who worked for the Action T4 program of Nazi Germany Carolin Widmann (born 1976), German violinist, sister of Jörg Erasmus Widmann (1572–1634), South German composer Frederick Widmann (1859–1925), German-born American architect and philanthropist Horst Widmann (born 1938), Austrian painter Johannes Widmann (1460–1498), German mathematician, invented the addition (+) and the subtraction (-) signs Jörg Widmann (born 1973), German composer and clarinetist, brother of Carolin Rosina Widmann née Binder (1826–1908), German educator and missionary
See also Dyckerhoff & Widmann (Dywidag), construction company based in Munich, Germany Villa Widmann – Foscari, villa at the shores of the river Brenta between Venice and Padua Widman, a Swedish surname Weidemann Weidmann Wideman Widemann Wiedemann Wittmann