Kataysk () is a town and the administrative center of Kataysky District in Kurgan Oblast, Russia, located on the Iset River northwest of Kurgan, the administrative center of the oblast. Population:
It was founded in 1655 by Imperial Russia as Kataysky (). It was granted town status in 1944.
Within the framework of administrative divisions, Kataysk serves as the administrative center of Kataysky District. As an administrative division, it is incorporated within Kataysky District as Kataysk Town Under District Jurisdiction. As a municipal division, Kataysk Town Under District Jurisdiction is incorporated within Kataysky Municipal District as Kataysk Urban Settlement.