| Rabnitz | |
| Name Other: | Répce, Rábca |
| Pushpin Map: | Hungary |
| Pushpin Map Caption: | Location in Hungary |
| Source1: | confluence of Spratzbach and Thalbach |
| Source1 Location: | near Hollenthon, Lower Austria |
| Source1 Coordinates: | 47.5442°N 16.3094°W |
| Mouth: | Danube (Moson branch) |
| Mouth Location: | near Győr |
| Mouth Coordinates: | 47.7094°N 17.5721°W |
| Subdivision Type1: | Countries |
| Subdivision Name1: | Austria and Hungary |
| Basin Size: | 4506km2 |
The Rabnitz (Hungarian: Répce, Rábca) is a river in eastern Austria and northwestern Hungary. Its basin area is 4506km2.[1]
The Rabnitz is formed at the confluence of its two headstreams Spratzbach and Thalbach near Hollenthon in Lower Austria. It flows towards the east through Burgenland, and enters Hungary (Győr-Moson-Sopron County) near Répcevis. It receives the Hanság-főcsatorna, the canal that drains the Neusiedler See, from the left. It discharges into the Moson branch of the Danube near Győr.