Cirsium ownbeyi is a rare North American species of flowering plant in the aster family known by the common name Ownbey's thistle. It is native to the United States, where it has a narrow distribution in northeast Utah, southwest Wyoming, and northwest Colorado. There are almost 30 known populations, with a total of over 25,000 individuals. This plant grows in sagebrush, juniper-dominated habitat, and riparian zones. The substrate is usually sandstone, but sometimes limestone.