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Jean Baptiste Antoine Guillemin (January 20, 1796 in Pouilly-sur-Saône – January 15, 1842 in Montpellier) was a French botanist.

In 1812 he was apprenticed to a pharmacist in Dijon, and in 1814 moved to Geneva, where he studied with Jean Pierre Étienne Vaucher (1763–1841) and Augustin Pyramus de Candolle (1778–1841). Later he relocated to Paris, where he became curator of the herbarium and library of botanist Jules Paul Benjamin Delessert (1773–1784).

In 1827 he worked as an aide-préparateur at the Muséum national d'histoire naturelle, and in 1832 received his PhD. Two years later he succeeded Adolphe Brongniart (1801–1876) as an assistant naturalist to the chair of botany. In 1838 he led a research mission to Brazil to study tea cultivation. While here, he collected plants with Ludwig Riedel (1790-1861) of the National Museum of Rio de Janeiro.

With Achille Richard (1794–1852) and George Samuel Perrottet (1793–1870), he was co-author of a work on the flora of Senegambia (geographic location of present-day Senegal and Gambia) titled Florae Senegambiae Tentamen... (1830–1833). He was also the author of Zephyritis Taïtensis, considered to be the first enumeration of the plants of Tahiti. From 1834 until his death, he was editor of the Annales des Sciences Naturelles Botanique.

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