Lavaur (French pronunciation: [lavɔʁ]; Occitan: La Vaur) is a commune in the Tarn department in southern France.

Lavaur was taken in 1211 by Simon de Montfort during the wars of the Albigenses, a monument marking the site where Dame Giraude de Laurac (Lady of Lavaur) was killed,[3] being thrown down a well and stoned to death.

Lavaur stands on the left bank of the Agout, which is here crossed by a railway-bridge and a fine stone bridge of the 1770s.

The town carries on distilling and flour-milling and the manufacture of brushes, plaster and wooden shoes.

There is a subprefecture and a tribunal of first instance (a lower Court of Justice).