Zip Code 80108 — Castle Rock, CO

ZIP Code 80108 is associated with Castle Rock, CO, in Douglas County. The listed population estimate is 36,730; estimated density is 401.8 people per square mile. Among records with population estimates, it ranks #5 of 14 in Douglas County and #46 of 512 in CO.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (39.444410, -104.853210)

Data MetricLocal Statistic
Postal / Zip Code80108
Primary CityCastle Rock
State / ProvinceCO
CountyDouglas
Total Population36,730
Population Density401.8 people/sq mi
TimezoneAmerica/Denver

How 80108 Compares

MetricZIP 80108Douglas County recordsCO records
Population estimate36,730373,996 (sum)5,862,421 (sum)
Population Density401.8 /sq mi----
County population rank#5 of 14----
State population rank#46 of 512----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CO

ZIP CodeCityDistancePopulation estimate
ZIP 80134Parker4.7 mi80,302
ZIP 80109Castle Rock6.1 mi28,400
ZIP 80124Lone Tree6.4 mi22,555
ZIP 80130Littleton7.0 mi24,719
ZIP 80131Louviers8.6 mi276

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →