Black Hawk is a home rule municipality located in Gilpin County, Colorado, United States. The city population was 127 at the 2020 United States Census, making Black Hawk the least populous city in Colorado. The tiny city is a historic mining settlement founded in 1859 during the Pike's Peak Gold Rush. Black Hawk is now a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.