Persian Letters is a literary work, published in 1721, by Charles de Secondat, baron de Montesquieu, recounting the experiences of two fictional Persian noblemen, Usbek and Rica, who spend several years in France under Louis XIV and the Regency.

Charles Louis de Secondat, Baron de La Brède et de Montesquieu, generally referred to as simply Montesquieu, was a French judge, man of letters, historian, and political philosopher.