Lagardelle-sur-Lèze (French pronunciation: [laɡaʁdɛl syʁ lɛz], literally Lagardelle on Lèze; Occitan: La Gardèla de Lesa) is a commune in the Haute-Garonne department in southwestern France.

The inhabitants of the commune are called Lagardellois in French.

The village was twinned with Bassano in Teverina in Italy.

The Lèze flows northeast through the middle of the commune and crosses town.

This Haute-Garonne geographical article is a stub.