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Zip Code 80104 — Castle Rock, CO

80104 is a ZIP Code associated with Castle Rock, CO, located within Douglas. The postal region supports an estimated population of 38,479 residents across Data Pending housing units, with a population density of 210.2 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.302130, -104.819670)

Data MetricLocal Statistic
Postal / Zip Code80104
Primary CityCastle Rock
State / ProvinceCO
CountyDouglas
Total Population38,479
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density210.2 people/sq mi
TimezoneAmerica/Denver

How 80104 Compares

MetricZIP 80104Douglas CountyCO State Average
Population38,479373,9965,862,421
Median IncomeData PendingN/AN/A
Population Density210.2 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 80116Franktown5.4 mi5,132N/A
Zip 80109Castle Rock6.1 mi28,400N/A
Zip 80118Larkspur8.4 mi5,632N/A
Zip 80108Castle Rock10.0 mi36,730N/A
Zip 80134Parker12.7 mi80,302N/A

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 →