| Sherna | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 89km (55miles) |
| Mouth: | Klyazma |
| Mouth Coordinates: | 55.845°N 38.5742°W |
| Basin Size: | 1890km2 |
The Sherna (Russian: Ше́рна) is a river in Vladimir and Moscow Oblasts in Russia. It is a left tributary of the Klyazma. It has a length of 89 km, and a drainage basin of 1890 km².[1] The river is formed by the confluence of the rivers Seraya and Molokcha.