Kocainiş is a village in Mutki District, in Bitlis Province, Türkiye. Kocainiş lies at 1,527 m above sea level, in the Southeastern Taurus mountains. It has 569 inhabitants. The nearest city is Muş, 24 km to the northwest. Among the landmarks around are Arakelots Monastery (18.9 km), Aghperig Monastery (4.3 km) and Surp Marineh Church (24 km).