Ironton is an extinct town located in Ouray County, Colorado, United States. It lay south of the present town of Ouray, adjacent to the sites Guston and Red Mountain Town, fellow ghost towns. During the 1880s and 1890s, Ironton formed part of the Red Mountain Pass mining district, the second largest silver mining district in Colorado. The Ironton post office operated from May 2, 1883, until August 2, 1920.