Lauzun (French pronunciation: [lozœ̃]; Languedocien: Lausun) is a commune in the Lot-et-Garonne department in south-western France.

[3] Lauzun's strategic hilltop position was the site of a Gallo-Roman settlement, with a castle developed from the 6th century.

In 1793, Lauzun was made a district centre of the Lot and Garonne department, with a law court and a post office.

In the 2007 presidential elections, Lauzun voted narrowly for Segolene Royal (50.11%) ahead of the eventual victor, Nicolas Sarkozy (49.89%).

[5] In the 2012 presidential elections, Lauzun voted narrowly for Nicolas Sarkozy (51.94%) ahead of the eventual victor, Francois Hollande (48.06%).