The Kauylzhyr (; ) is a river in Shalkar District, Aktobe Region, Kazakhstan. It is long and has a catchment area of .
The river is part of the Shalkar Basin. It is fed mainly by snow. Its waters are used to water livestock.
Course The Kauylzhyr has its sources on the southeastern slopes of the Mugalzhar Hills. It heads roughly southeastwards most of its course. In its final stretch it bends southwards and enters lake Shalkar from the north.Google EarthNature of Kazakhstan Encyclopedia / General editor. B. O. Jacob. - Almaty: "Kazakh Encyclopedia" LLP, 2011. T.Z. - 304 pages. ISBN 9965-893-64-0 (T.Z.), ISBN 9965-893-19-5
The width of the river channel is between and . The main tributaries of the Kauylzhyr are the Alabassay, Karabulaksay, Sarysay and Koganzhar.
See also List of rivers of Kazakhstan
References
External links IMPACT OF CLIMATE CHANGE AND ANTHROPOGENIC ACTIVITIES ON THE WATER AND BIOLOGICAL RESOURCES OF LAKE SHALKAR IN WESTERN KAZAKHSTAN