| Lèze | |
| Image Alt: | The Lèze in Beaumont-sur-Lèze |
| Pushpin Map: | France#France Occitanie |
| Source1 Location: | La Bastide-de-Sérou |
| Source1 Coordinates: | 43.0339°N 1.4842°W |
| Mouth Coordinates: | 43.4633°N 1.4186°W |
| Subdivision Type1: | Country |
| Length: | 70.2km (43.6miles) |
| Source1 Elevation: | 570m (1,870feet) |
| Mouth Elevation: | 155m (509feet) |
| Discharge1 Avg: | 2.01m3/s |
| Basin Size: | 351km2 |
The Lèze (pronounced as /fr/) is a 70.2km (43.6miles) long river in the Ariège and Haute-Garonne départements, southwestern France. Its source is in La Bastide-de-Sérou. It flows generally north. It is a left tributary of the Ariège into which it flows between Labarthe-sur-Lèze and Clermont-le-Fort.
This list is ordered from source to mouth: