Castle Rock, Colorado

Castle Rock, Colorado
Looking down Wilcox Street (2018)
Location within Douglas County and Colorado
Castle Rock
Location of Castle Rock
Castle Rock
Castle Rock (Colorado)
Coordinates: 39°22′20″N 104°51′22″W / 39.3722°N 104.8561°W / 39.3722; -104.8561 (Castle Rock, Colorado)
CountryUnited States
StateColorado
CountyDouglas
Founded1874
IncorporatedApril 14, 1881
Government
 • Typehome rule town
 • MayorJason Gray
Area
34.742 sq mi (89.981 km2)
 • Land34.742 sq mi (89.981 km2)
 • Water0 sq mi (0.000 km2)
Elevation
6,224 ft (1,897 m)
Population
 (2020)
73,158
 • RankUS: 445th
CO: 14th
 • Density2,308.2/sq mi (891.19/km2)
 • Urban
2,686,147 (US: 18th)
 • Metro
2,985,871 (US: 19th)
 • Combined
3,663,515 (US: 18th)
 • Front Range
5,055,344
Time zoneUTC−07:00 (MST)
 • Summer (DST)UTC−06:00 (MDT)
ZIP code
80104, 80108, 80109
Area codes303/720/983
GNIS pop ID169449
GNIS town ID2413179
FIPS code08-12415
Major highways
Websitecrgov.com

Castle Rock is a home rule town that is the county seat of and the most-populous municipality in 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 (rather than city) 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.

The town is named for the prominent, castle-shaped butte near the center of town.