Fremont County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 48,939. The county seat is Cañon City. The county is named for 19th-century explorer and presidential candidate John C. Frémont. Fremont County comprises the Cañon City, CO Micropolitan Statistical Area, which is also included in the Pueblo-Cañon City, CO Combined Statistical Area. Rural Fremont County is the location of 15 prisons; most of these are operated by the state.