The Urzhumka (Russian: Уржумка) is a river in Mari-Tureksky District of the Republic of Mari El and in Urzhumsky District of Kirov Oblast in Russia.

The town of Urzhum on the left bank of the Urzhumka is about 10 kilometres (6.2 mi) from its mouth.

The source of the Urzhumka is in the woods in the western part of Mari-Tureksky District.

The river flows east and in the selo of Bolshoye Oparino turns northeast.

The Ireka, a right tributary of the Urzhumka, in the lower course marks the border between Mari El and Kirov Oblast.