| Istra | |
| Mouth Coordinates: | 55.7418°N 37.1405°W |
| Subdivision Type1: | Country |
| Length: | 113km (70miles) |
| Discharge1 Avg: | 11.3m3/s |
| Basin Size: | 2050km2 |
Istra is a river in Moscow Oblast, Russia. It is a left tributary of the Moskva. It is long, and has a drainage basin of .[1] The town of Istra is located on it.