ZIP code 80109: Castle Rock, CO
80109 is a ZIP code in Castle Rock, Colorado, mainly in Douglas County, part of the Denver-Aurora-Centennial, CO metro area. About 28,400 people live here.
- Population
- 28,400
- Median household income
- $155,025
- Typical home value
- $646,400-1.3% in 12 months
- Median rent
- $2,304gross, per month
- Median age
- 36.9
- Homeowners
- 81.4%of occupied homes
Shaded: ZIP code 80109's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 80109 details
| City | Castle Rock |
|---|---|
| State | Colorado |
| County | Douglas County |
| Metro area | Denver-Aurora-Centennial, CO |
| Time zone | Mountain Time (UTC−7), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 26 sq mi, plus 0 sq mi of water |
| Population density | 1,093 people per sq mi |
| Bachelor's degree or higher | 57.8% of adults 25+ |
| Average commute | 26.8 minutes |
| Center coordinates | 39.37234, -104.91209 |
Median rent in 80109 by bedrooms
| Size | Median gross rent |
|---|---|
| 1 bedroom | $1,750/mo |
| 2 bedrooms | $2,258/mo |
| 3 bedrooms | $2,421/mo |
| 4 bedrooms | $3,129/mo |
| 5+ bedrooms | $3,364/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 80109
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 80163 | Littleton, CO | 4.7 mi | — |
| 80108 | Castle Rock, CO | 5.9 mi | 36,730 |
| 80104 | Castle Rock, CO | 6.9 mi | 38,479 |
| 80131 | Louviers, CO | 8.9 mi | 276 |
| 80134 | Parker, CO | 10.4 mi | 80,302 |
| 80130 | Littleton, CO | 10.8 mi | 24,719 |
| 80124 | Lone Tree, CO | 11.1 mi | 22,555 |
| 80125 | Littleton, CO | 11.2 mi | 15,630 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 80109?
A typical home in ZIP code 80109 is worth about $646,400 (Zillow Home Value Index). The median household here earns $155,025 a year. See what buying here would cost per month, with Colorado average taxes and insurance filled in.
Monthly payment for a $646,400 homeWhat can a $155,025 income afford?Rental property numbers
About ZIP code 80109
What city is ZIP code 80109?
ZIP code 80109 is in Castle Rock, CO, in Douglas County.
What county is ZIP code 80109 in?
80109 is mainly in Douglas County, Colorado.
What is the population of ZIP code 80109?
About 28,400 people live in ZIP code 80109, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 80109 in?
80109 is in Mountain Time (UTC−7). It observes daylight saving time.