Marignac


 * Jean Charles Galissard de Marignac (1817–1894) was a Swiss chemist
 * Marignac's salt is potassium oxyfluorotantalate

Marignac is the name or part of the name of the following communes in France:


 * Marignac, Charente-Maritime, in the Charente-Maritime department
 * Marignac, Haute-Garonne, in the Haute-Garonne department
 * Marignac, Tarn-et-Garonne, in the Tarn-et-Garonne department
 * Marignac-en-Diois, in the Drôme department
 * Marignac-Lasclares, in the Haute-Garonne department
 * Marignac-Laspeyres, in the Haute-Garonne department