Castanea ozarkensis, also known as the Ozark chinkapin (also spelled chinquapin), is a species of tree that is native to the United States. It is in the Castanea genus that includes chestnuts and types of chestnut known as chinkapins. Some authorities consider it a variant of the Allegheny chinkapin (C. pumila) as C. pumila ozarkensis. It grows in the Ozark Mountains and Ouachita Mountains of Missouri, Arkansas and Oklahoma. The nuts it produces provided food for indigenous people, early settlers, and various animals including squirrel, chipmunk, deer, turkey, and bobwhite.