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City ZIP codes · Colorado

Castle Rock, CO ZIP Codes

3 ZIP codes use the postal name Castle Rock, Colorado (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $134,335 in 80104 to $181,049 in 80108, 1.3 times as much (Census Bureau, ACS 2020-2024). Castle Rock's most populous ZIP code is 80104, with 38,479 people (ACS 2020-2024); 19% of its land is in the city of Castle Rock.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Castle Rock's ZIP codes?

80104: $134k median household income80108: $181k median household income80109: $155k median household income80104801088010980104: $134k median household income80108: $181k median household income80109: $155k median household income80104801088010980104: $134k median household income80108: $181k median household income80109: $155k median household income801048010880109
The 3 residential ZIP codes named Castle Rock, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Castle Rock's ZIP codes?

The highest median household income is in 80108 ($181,049), the lowest in 80104 ($134,335). Home values run from $624,200 in 80104 to $881,700 in 80108.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 3 residential ZIP codes of Castle Rock

Residential ZIP codes with the postal name Castle Rock, CO, largest first (ACS 2020-2024); sort by any column
County
80104 Douglas County 38,479 544 $134k $624k
80108 Douglas County 36,730 1,041 $181k $882k
80109 Douglas County 28,400 1,093 $155k $676k

Download the 3 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do Castle Rock's ZIP codes reach?

Castle Rock's residential ZIP codes lie in Douglas County.

Which places do Castle Rock's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Castle Rock's residential ZIP codes cover Castle Rock itself and 2 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Castle Pines 80108
  • Castle Pines Village census-designated 80108

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Castle Rock's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Castle Rock starts with 801.

Three-digit prefixes of Castle Rock's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Castle Rock's
PrefixSectional centerHereAll codes
801 Denver, CO (SCF 800) 3 44

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.