Cimarron is an unincorporated rural hamlet in Montrose County, Colorado, United States. It is located on the northern side of U.S. Highway 50, 19 miles from the town of Montrose to its west, and 42 miles from Gunnison, Colorado to its east. There is a store with fuel pumps and a post office at Cimarron. The post office services the rural ZIP Code 81220 area.