Summary for Castle Rock
About Castle Rock (Click for our profile page)
Located in: Douglas County (see below)
Time Zone: Castle Rock lies in the Mountain Time Zone (MST/MDT)
Telephone Area Codes: (303), (720)<1>
ZIP Code: 80104<2>
Elevation: 6,300 feet [1,920.24 m] above sea level<3>
From the 2010 US Census (For more detail, see our Census Page for Castle Rock)
Population
| Year | Population |
| 2019 Est:<4> | 67,738 (40.44% increase since 2010) |
| 2010: | 48,231 (138.5% increase since 2000) |
| 2000: | 20,224 |
Total Area:<5> 33.79 sq. miles [87.5 km²]
Housing Units:<6> 17,626
Official Website: www.townofcastlerock.org/
GPS Coordinates (Latitude/Longitude)<7>
For the purpose of mapping and calculating distances, we have chosen the following reference point for Castle Rock:
Lat: 39.374500° (or 39°22'28" N)
Lon: -104.856500° (or -104°51'23" W)
USGS Topo Map: Castle Rock North<8>
Federal GNIS/FIPS Codes for Castle Rock
GNIS ID: 2413179
FIPS State / Place Code: 08 / 12415
(For more about Federal Codes, see our Misc Page for Castle Rock)
About Douglas County
The town of Castle Rock is the County Seat for Douglas County.
From the 2010 US Census (For more detail, see our Census Page for Douglas)
Population
| Year | Population |
| 2019 Est: | 351,842 (23.25% increase since 2010) |
| 2010 | 285,465 (62.4% increase since 2000) |
| 2000: | 175,766 |
Total Area: 842 sq. miles [2,183 km²]
Housing Units: 106,859
Official Website: www.douglas.co.us/
Federal GNIS/FIPS Codes for Douglas
GNIS ID: 198133
FIPS State / County Code: 08 / 035
(For more about Federal Codes, see our Misc Page for Castle Rock)
About Colorado
From the US Census
Population
| Year | Population |
| 2019 Est: | 5,758,486 (14.5% increase since 2010) |
| 2010: | 5,029,196 (16.92% increase since 2000) |
| 2000: | 4,301,261 |
Websites for State of Colorado
Official Website: https://www.colorado.gov/
Tourism: https://www.colorado.com/
Parks: cpw.state.co.us/
Fishing: cpw.state.co.us/thingstodo/Pages/Fishing.aspx
Hunting: cpw.state.co.us/thingstodo/Pages/Hunt.aspx
Federal GNIS/FIPS Codes for State of Colorado
GNIS ID: 1779779
FIPS State: 08
(For more about Federal Codes, see our Misc Page for Castle Rock)
Off-the-Road Links ...
The official website for Castle Rock: www.townofcastlerock.org/
The official website for Douglas County: www.douglas.co.us/
The official website for State of Colorado: https://www.colorado.gov/
Footnotes ...
| <1> | Area code (720) is an overlay for area code (303). |
| <2> | ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a town (such as Castle Rock). When looking for a ZIP Code, whether Castle Rock or elsewhere, it's always best to check the website of the United States Postal Service (USPS). |
| <3> | The elevation is an estimate for the area around Castle Rock - it will be higher in some places and lower in others. |
| <4> | Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2019. |
| <5> | The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Castle Rock. The value given by the Census Bureau reflects their statistical (or sampling) requirements. For example, if there is a cluster of people living just outside of the community's official boundary, the Census-defined area might be expanded to include that group. |
| <6> | A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway). |
| <7> | Longitude & latitude values may not be the geographic center of Castle Rock, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source. |
| <8> | Name of the USGS 7.5 Minute topographic map which includes Castle Rock. |