Dayirmanchay is a river in the Kars uezd of the Kars governorate, later in the former Amasiya (Aghbaba) district, and currently in the Shirak province. It is the left tributary of the Arpachay (Akhurian) River. Its length is 10 km.

The river was named “Darimanchay” because it was used in the operation of a mill.