| Aurach | |
| Mouth Location: | Ager |
| Mouth Coordinates: | 48.0055°N 13.7377°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Austria |
| Subdivision Type2: | State |
| Subdivision Name2: | Upper Austria |
| Length: | 28.6km (17.8miles) |
Aurach (pronounced as /de/) is a river in the Austrian state of Upper Austria.
It originates in the area of the mountain in the and flows through the wooden rich Aurach Valley, that spreads through the communities of Altmünster (districts, Reindlmühl, Finsterau) and Pinsdorf (district Kufhaus). After leaving the Aurach Valley the river flows further through the Alpine foothills via Aurachkirchen (district of Ohlsdorf) until Wankham (municipality Regau), where it converges with the river Ager.