Johann Jacob Reichard (7 August 1743 in Frankfurt am Main – 21 January 1782 in Frankfurt am Main) was a German physician and botanist.
He studied medicine, philosophy and natural sciences at the University of Göttingen, receiving his doctorate in 1768.
While working as a physician in his hometown, he carried out investigations of flora native to the Frankfurt am Main area, publishing Flora Moeno-Francofurtana (2 volumes, 1772–78) as a result.
Beginning in 1773, he served as chief physician at the Senckenburg Foundation, in which capacity, he was in charge of its library, botanical gardens and chemistry laboratory.
From 1779 he worked as a physician at the BĂĽrgerhospital in Frankfurt.In 1775 he became a member of the Academy of Sciences Leopoldina.
In 1780 he was founding editor of the periodical, Medizinisches Wochenblatt fĂĽr Aerzte, Wundarzte und Apotheker.
The plant genus Reichardia (family Asteraceae) was named in his honor by Albrecht Wilhelm Roth.