| Weismain | |
| Mouth Coordinates: | 50.1305°N 11.253°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Bavaria |
| Length: | 17.8km (11.1miles) |
Weismain (with German article die Weismain) is a river in Upper Franconia, Bavaria, Germany. With about 18 km length, it is a left tributary of the Main near Altenkunstadt. It flows through the town Weismain.