| Thur | |
| Pushpin Map: | France#France Grand Est |
| Mouth Coordinates: | 47.8756°N 7.3428°W |
| Subdivision Type1: | Country |
| Length: | 53km (33miles) |
| Source1 Elevation: | ±950m (3,120feet) |
| Discharge1 Avg: | 5.5m3/s |
| Basin Size: | 262km2 |
The Thur (in French pronounced as /tyʁ/) is a river in the Haut-Rhin department, Alsace, France, left tributary of the river Ill. It rises in the Vosges Mountains, and flows through the towns Thann and Cernay. It flows into the Ill (a tributary of the Rhine) near Ensisheim, north of Mulhouse. It is 53km (33miles) long.