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| Oberach | |
|---|---|
|   | |
    | |
| Location | |
| Country | Austria | 
| State | Upper Austria | 
| Physical characteristics | |
| Mouth | |
 • location  | Antiesen | 
 • coordinates  | 48°13′52″N13°28′11″E / 48.2311°N 13.4696°E | 
| Length | 18.2 km (11.3 mi) [1] | 
| Basin features | |
| Progression | Antiesen→ Inn→ Danube→ Black Sea | 
Oberach is a river in the Innviertel of the Austrian state of Upper Austria. It is a tributary of the Antiesen. [2] [3] Its source is in the municipality of Pramet. Below its confluence with the Breitsach in Ried im Innkreis, it is also called Rieder Bach. [2] [3]