Jules Thurmann (5 November 1804, Neuf-Brisach in Haut-Rhin, France – 25 July 1855, Porrentruy) was an Alsatian French-Swiss geologist and botanist.He studied at the college in Porrentruy, then continued his education at the University of Strasbourg and at the École royale des mines in Paris. In 1832 he was appointed professor of mathematics and natural sciences at Porrentruy College. In 1837 he became the first director of the "normal school" for teachers in Porrentruy.