| Schwarzwasser | |
| Subdivision Type1: | Countries |
| Subdivision Name2: | Saxony |
| Subdivision Type3: | Region (CZ) |
| Subdivision Name3: | Karlovy Vary |
| Source1 Location: | on the Fichtelberg |
| Source1 Elevation: | ca. |
| Mouth Location: | in Aue into the Zwickauer Mulde |
| Discharge1 Location: | at Aue 1 gauge |
| Discharge1 Avg: | [1] |
| Discharge1 Max: | Average high: Record high: (in 2002) |
| Tributaries Right: | Große Mittweida |
| Waterbodies: | Reservoirs: Myslivny Reservoir |
| Custom Label: | References |
The Schwarzwasser (in German) or Černá (in Czech) is a river in Germany and the Czech Republic. The name means 'black'. It is a right tributary of the Zwickauer Mulde in the German state of Saxony. It flows through Schwarzenberg.