Castle Rock, Colorado

Castle Rock is a home rule town that is the county seat and the most populous municipality of Douglas County, Colorado, United States. The town’s population was 73,158 at the 2020 census, a 51.68% increase since the 2010 census. Castle Rock is the most populous Colorado town and the 14th most populous Colorado municipality. Castle Rock is a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and the Front Range urban corridor.

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