| Sude | |
| Mouth Location: | Elbe |
| Mouth Coordinates: | 53.372°N 10.6929°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | States |
| Tributaries Left: | Krainke, Rögnitz, Zare |
| Tributaries Right: | Boize, Schaale, Schmaar |
The Sude is a river in Mecklenburg-Vorpommern and Lower Saxony, Germany. Its source is near Renzow (a district of Schildetal) in western Mecklenburg. It flows through the lake Dümmer See, and continues past Hagenow and Lübtheen. It flows into the Elbe in Boizenburg.