The Bolshoy Zelenchuk (Russian: Большой Зеленчук, Abaza: Йынджьыгь-Ду, Adyghe: Инжыджышхуэ, Karachay-Balkar: Уллу Инджик, romanized: Ullu İncik, Nogai: Уьйкен Йилиншик, romanized: Üyken Yilinşik) is a river in the North Caucasus, Russia.

It is a left tributary of the Kuban into which it flows at Nevinnomyssk.

It is 158 kilometres (98 mi) long, and has a drainage basin of 2,730 square kilometres (1,050 sq mi).

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