Castle Rock, CO Insights: Population,
Zip Codes, Influence, and Service Areas

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 population was 73,158 at the 2020 United States Census, a 51.68% increase since the 2010 United States Census. Castle Rock is the most populous Colorado town (rather than city) and the 16th most populous Colorado municipality. Castle Rock is a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.

Zip Codes in Castle Rock, CO that we also serve: 80104 80108 80109





Cities Close To Castle Rock, CO That We Also Serve



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