The Irgiz ( Yrgyz; ) is a river in Aktobe and Kostanay regions of Kazakhstan, a right tributary of the Turgay. It is long, and has a drainage basin of .Иргиз, Great Soviet Encyclopedia It was the site of the Irghiz River skirmish in the early 13th century.
Course The Irgiz rises on the eastern slopes of the Mugodzhar Hills in the Aktobe region of Kazakhstan. It flows in a predominantly southerly direction to its confluence with the Turgay. Its main tributary is the long Chet-Irgiz (Шет-Иргиз) from the right.
See also List of rivers of Kazakhstan Lakes of the lower Turgay and Irgiz
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