ZIP code · Castle Rock · Colorado · United States
ZIP code 80109 — Castle Rock
ZIP code 80109 serves Castle Rock, Colorado.
- Postal code
- 80109Single source Value from one source, not cross-checked.
- City
- Castle Rock
- County
- Douglas FIPS 08035
- State
- Colorado
- Country
- United States
- Coordinates
- 39.3643, -104.9014 — precision precise (locality)
View on OpenStreetMap - Population
- 27,795 (ZCTA, ACS 5-year)
- Population density
- 1,070 / sq mi
- Land area
- 26 sq mi (67.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $148,417
- Per-capita income
- $58,362
- Median age
- 35.8
- Households
- 9,449
- Housing units
- 9,598
- Median home value
- $648,900
- Median gross rent
- $2,245 / month
- Congressional district
- CO-4 (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Denver (UTC−7 / UTC−6 DST)
Tools: compare 80109 with another ZIP · ZIPs within 25 miles · distance from 80109
Map of ZIP code 80109
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 18°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 46 | 47 | 54 | 59 | 68 | 80 | 86 | 84 | 77 | 65 | 54 | 46 |
| Avg low °F | 18 | 20 | 27 | 33 | 42 | 51 | 56 | 55 | 47 | 35 | 26 | 18 |
| Precip in | 0.6 | 0.7 | 1.5 | 2.1 | 2.0 | 2.2 | 2.3 | 2.5 | 1.4 | 0.8 | 0.8 | 0.7 |
NOAA 1991–2020 climate normals from the nearest station: CASTLE ROCK (3.2 mi) · NOAA NCEI
Places in ZIP 80109
- 14 schools
- 1 colleges & universities
- 11 hospitals & clinics
- 12 doctors & dentists
- 24 restaurants & cafés
- 1 bars & pubs
- 37 parks
- 52 playgrounds
- 14 gyms & sports centres
- 8 places of worship
- 3 banks
- 7 gas stations
- 4 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page