Castle Rock, CO ZIP Codes
Castle Rock, Colorado has 3 ZIP codes: 3 for street addresses (, and ).
Your street decides which one you use.
Which Castle Rock ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Castle Rock ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Castle Rock town limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Castle Rock ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 80104 | street delivery Castle Rock |
| 80108 | street delivery Castle Rock Annex |
| 80109 | street delivery Castle Rock Annex |
Why your mail may say Castle Rock when you live outside it
Castle Rock ZIP codes also cover Castle Pines and Castle Pines Village, so a letter addressed to Castle Rock can go to a home outside the town limits.
A ZIP code does not set your city, school district or tax. Douglas County property records show which city you are in.
Castle Rock ZIP code questions
What is the main ZIP code for Castle Rock?
80104, the ZIP code of the main Castle Rock post office at 220 S Wilcox St.
What county is Castle Rock in?
Douglas County.
ZIP codes for towns near Castle Rock
More towns near Castle Rock: Dakota Ridge, Aurora, Lakewood, Denver, Wheat Ridge, Commerce City, Arvada, Colorado Springs, Westminster.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections