| Kotorosl | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 132km (82miles) |
| Mouth: | Volga |
| Mouth Coordinates: | 57.6161°N 39.9058°W |
| Basin Size: | 6370km2 |
The Kotorosl (ru|Ко́торосль) is a right tributary of the Volga in Yaroslavl Oblast, Russia. The river flows from Lake Nero near Rostov past Karabikha and enters the Volga in Yaroslavl. It is long, and has a drainage basin of .[1]
In the medieval ages, the river was highly important strategically, for it connected Rostov with major waterways of Russia. The Kotorosl's main tributary is the Ustye, which flows past Semibratovo to Borisogleb, discharging into the Ustye from the left.