Jacques Sirmond (12 or 22 October 1559 - 7 October 1651) was a French scholar and Jesuit.
Simond was born at Riom, Auvergne. He was educated at the Jesuit College of Billom; having been a novice at Verdun and then at Pont-Mousson, he entered into the order on 26 July 1576. After having taught rhetoric at Paris he resided for a long time in Rome as secretary to Claudio Acquaviva (1590 - 1608). In 1637 he was confessor to Louis XIII.
He brought out many editions of Latin and Byzantine chroniclers of the Middle Ages:
An essay in which he denied the identity of St Denis of Paris and St Denis the Areopagite (1641), caused a controversy. His Opera varia, where this essay is to be found, as well as a description in Latin verse of his voyage from Paris to Rome in 1590, have appeared in 5 vols (1696; new ed. Venice, 1728). To him is attributed Elogio di cardinale Baronio (1607).