Johann Balthasar Schnetzler (3 November 1823 in Gächlingen – 29 June 1896 in Lausanne) was a Swiss naturalist.
In 1840/41, he studied at Polytechnic Stuttgart and, for a period of time, taught French classes at the Schaffhausen gymnasium.
From 1844 to 1847, he furthered his education at the University of Geneva and, from 1847 to 1867, worked as a science teacher at the progymnasium in Vevey.
In 1873, he published a book on introductory botany titled Entretiens sur la botanique.
[4] In the field of human nutrition, he collaborated with Henri Nestlé in the development of a powdered infant formula.