The Kotorosl (Russian: 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 132 kilometres long, and has a drainage basin of 6,370 square kilometres.
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.
