The Lot, pronounced: [lɔt], originally the Olt (Occitan: Òlt; Latin: Oltis), is a river in France, right tributary of the Garonne. It rises in the Cévennes, flowing west through Quercy, where it flows into the Garonne near Aiguillon, a total distance of 481 kilometres (299 mi). It gives its name to the Lot département.

The Lot is prone to flooding in the winter and spring.