Jean-François Séguier was a French archaeologist, epigraphist, astronomer and botanist from Nîmes.
He studied law in Montpellier, during which time, he developed a passion for botany. He was a friend and collaborator to Scipio Maffei, with whom he took an extended scientific tour throughout Europe. In 1755 he became a member of the Académie de Nîmes, serving as its secrétaire perpétuel from 1765 to 1784. In 1772 he became a member of the Académie royale des Inscriptions et Belles-Lettres.
The plant genus Seguieria commemorates his name, as do the botanical species Ranunculus seguieri, Euphorbia seguieriana and Dianthus seguieri.