Korgalzhyn State Nature Reserve (Kazakh: Қорғалжын мемлекеттік табиғи қорығы, Qorğaljyn memlekettık tabiği qoryğy) is a protected area in Aqmola and Karaganda regions of Kazakhstan, located west of the city of Astana. It is part of the UNESCO heritage site Saryarka — Steppe and Lakes of Northern Kazakhstan, Ramsar site and biosphere reserve.