Dimitrie Gianni (nicknamed Tache Gianni; 15 July 1838–27 June 1902) was a Wallachian-born Romanian lawyer and politician. Born in Bucharest, he descended from a Greek family that had settled in Wallachia. After attending gymnasium in Berlin, he went to the University of Paris, receiving a law degree. Gianni returned to Romania in 1865 and was named prosecutor at the Bucharest criminal court. In 1867, he became an adviser at the Finance Ministry. Subsequently, he practiced as a lawyer for the remainder of his career, rising to become dean of the Ilfov County bar in 1896.