| Innbach | |
| Mouth Coordinates: | 48.3212°N 14.1609°W |
| Subdivision Type1: | Country |
| Length: | 58.8km (36.5miles) |
| Basin Size: | 196km2 |
The Innbach is a river in Upper Austria with a length of approximately . Its source is near Gaspoltshofen at the foot of the hills and empties into the Danube at Wilhering. Its drainage basin covers . After Gaspoltshofen, the Innbach passes the towns of Kematen am Innbach, Pichl bei Wels and Bad Schallerbach, at the mouth of the . Near Eferding, it joins with the Aschach and a few kilometers later flows into the Danube downstream of the .
Due to its high volume, many mills were once located along the Innbach.
The Innbach is populated with many species of fish, among them: brown trout, brook trout, bullhead, minnow, grayling, gudgeon, rainbow trout, chub, barbel, roach, rudd, spirlin, perch, nase, dace, bleak, carp, bream, burbot, pike, zander, and catfish.