| Seda River | |
| Mouth Coordinates: | 57.7679°N 25.2465°W |
| Subdivision Type1: | Country |
| Length: | 62 km |
The Seda River (Estonian: Säde River) is a river in Latvia. The river is 62 km long.[1] The river flows into Lake Burtnieks.
Historians suggest that in the Middle Ages the Säde River was the border between Estonia and Latvia.