Castle Rock, Colorado
The Town of Castle Rock is the Home Rule Municipality that is the county seat and the most populous municipality of Douglas County, Colorado, United States. Castle Rock is the most populous town in the State of Colorado. Castle Rock had 48,231 residents at the 2010 United States Census, with an estimated population of 64,484 as of 2019. It is named for the prominent, castle tower-shaped butte near the center of town. Midway between Denver and Colorado... Show more Springs, Castle Rock is part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.