| Brenz | |
| Map: | Brenz (rivière).png |
| Mouth Location: | Danube |
| Mouth Coordinates: | 48.5606°N 10.4203°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Length: | 51.6km (32.1miles) |
| Basin Size: | 876km2 |
The Brenz (pronounced as /de/) is a river in Baden-Württemberg and Bavaria, Germany. It is a left tributary of the Danube. Its source is at a spring in the town of Königsbronn and it flows for 52 kilometers before meeting the Danube at Lauingen, a few kilometers west of Dillingen. It flows through the towns of Königsbronn, Heidenheim an der Brenz, Giengen and Lauingen.