The Ulken Damdi (Kazakh: Үлкен Дәмді; (Russian: Улькендамды),[1] is a river in the Karasu, Nauyrzym and Amangeldi districts of Kostanay Region, Kazakhstan.

[2][3] The river flows by Damdi and Mereke settlements.

The river heads initially southwestwards as the Damdi, then it bends southwards.

[3][4] The main tributary of the Ulken Damdi is the 91 km (57 mi) long Moiyldi from the left.

[4] This article related to a river in Kazakhstan is a stub.