| Johann Bauhin | |
| Birth Date: | 12 December 1541 |
| Birth Place: | Old Swiss Confederacy |
| Death Place: | Montbéliard, Kingdom of France |
| Field: | Botany |
| Work Institution: | University of Basel |
| Education: | University of Basel (M.D., 1649) |
| Thesis Title: | Signorum medicorum doctrina annexa sphygmice, uromantia et crisium theoria, ex praecipuis Galen. et Hippocr. monumentis semeioticis excerpta |
| Thesis Url: | https://www.worldcat.org/formats-editions/247330038 |
| Thesis Year: | 1649 |
| Doctoral Advisor: | Emmanuel Stupanus |
| Academic Advisors: | Leonhart Fuchs |
| Doctoral Students: | Nikolaus Eglinger |
| Known For: | Historia plantarum universalis |
| Father: | Jean Bauhin |
| Relatives: | Gaspard Bauhin (brother) |
Johann (or Jean) Bauhin (12 December 1541 – 26 October 1613) was a Swiss botanist, born in Basel. He was the son of physician Jean Bauhin and the brother of physician and botanist Gaspard Bauhin.
Bauhin studied botany at the University of Tübingen under Leonhart Fuchs (1501–1566). He then travelled with Conrad Gessner, after which he started a practice of medicine at Basel, where he was elected Professor of Rhetoric in 1566. Four years later he was invited to become the physician to Frederick I, Duke of Württemberg at Montbéliard, in the Franche-Comté where he remained until his death. He devoted himself chiefly to botany. His great work, Historia plantarum universalis, a compilation of all that was then known about botany, remained incomplete at his death, but was published at Yverdon in 1650–1651.
Bauhin nurtured several botanic gardens and also collected plants during his travels. In 1591, he published a list of plants named after saints called De plantis a divis sanctisve nomen habentibus.
Johann Bauhin died in Montbéliard.
Carl Linnaeus named the genus Bauhinia (family Caesalpiniaceae) for the brothers Johann and Gaspard Bauhin.