| Ahr | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Italy |
| Length Km: | 50.3 |
| Source1 Location: | Below the Birnlücke pass, South Tyrol, Italy |
| Source1 Coordinates: | 47.0767°N 12.2081°W |
| Mouth: | Rienz |
| Mouth Location: | near Bruneck, South Tyrol, Italy |
| Mouth Coordinates: | 46.7933°N 11.9228°W |
| Mouth Elevation: | 815m (2,674feet) |
| Basin Size Km2: | 629 |
| Tributaries Left: | Reinbach |
The Ahr (pronounced as /de/; it|Aurino pronounced as /it/) is a river in South Tyrol, Italy, which flows through the Tauferer Ahrntal.