Joachim Weimann (born February 14, 1956) is a German economist. He is currently the chair for Economic Policy at the Otto-von-Guericke University Magdeburg. Weimann's research interests include environmental economics and behavioral economics.
Born in Düsseldorf, Northrhine-Westphalia, Weimann attended the University of Bielefeld. He earned his doctoral degree in 1987, and his Habilitation in 1992, both from the University of Dortmund. In 1994 he was offered a professorship at the University of Magdeburg. Among his doctorate students was Axel Ockenfels.