Denver, the state capital and largest city of Colorado in the United States, is a combined city and county. At the 2020 census, its population was 715,522, up 19.22% from 2010. It is the fifth most populous state capital and the 19th most populous city in the country. As the largest metro area in Colorado, its primary city is part of the Denver–Aurora–Lakewood metro area. It is also the first city along the Front Range Urban Corridor.