Douglas County, CO ZIP codes
There are 15 ZIP codes in Douglas County, CO, in 8 towns, from 80104 to 80163. The largest are 80134 (Parker), 80126 (Littleton) and 80104 (Castle Rock).
The county seat is Castle Rock.
- ZIP codes
- 15
- Towns
- 8
- County seat
- Castle Rock
- County FIPS
08035- State
- Colorado
- Population
- 377,150
- Median household income
- $149,594
- Land area
- 841 sq mi
- Metro area
- Denver-Aurora-Centennial
Douglas County ZIP codes by town
- Castle Rock (county seat)
- 80104, 80108, 80109
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Douglas County ZIP codes
The ZIP codes of Douglas County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Douglas County in numbers
About 377,150 people live in Douglas County, in 139,960 households, the 6th most populous of Colorado's 64 counties. The median household income is $149,594 a year, 57% above the Colorado median of $95,470 (US: $80,734). The median owner-occupied home is valued at $713,600 (32% above the Colorado median), and median gross rent is $2,193 a month. The median age is 39.6; 62.0% of adults 25 and over hold a bachelor's degree or higher (45.7% across Colorado); the average commute takes 27 minutes.
| Population | 377,150 |
|---|---|
| Households | 139,960 |
| Median age | 39.6 |
| Median household income | $149,594 |
| Median home value | $713,600 |
| Median gross rent | $2,193 |
| Bachelor's degree or higher | 62.0% |
| Mean commute | 27.1 min |
| Population density | 449 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Douglas County
| Town | ZIP codes | Population |
|---|---|---|
| Castle Rock | 3 | 79,123 |
| Parker | 2 | 61,783 |
| Littleton | 5 | 44,710 |
| Lone Tree | 1 | 14,147 |
| Sedalia | 1 | 4,141 |
| Franktown | 1 | 472 |
| Louviers | 1 | 294 |
| Larkspur | 1 | 131 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Douglas County.
Not sure you are in Douglas County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Douglas County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
80104 | Castle Rock , CO | Standard | 38,479 | $134,335 | $624,200 |
80108 | Castle Rock , CO | Standard | 36,730 | $181,049 | $881,700 |
80109 | Castle Rock , CO | Standard | 28,400 | $155,025 | $675,500 |
80116 | Franktown , CO | Standard | 5,132 | $146,000 | $960,400 |
80118 | Larkspur , CO | Standard | 5,632 | $158,155 | $886,900 |
80124 | Lone Tree , CO | Standard | 22,555 | $129,858 | $773,900 |
80125 | Littleton , CO | Standard | 15,630 | $179,983 | $762,200 |
80126 | Littleton , CO | Standard | 44,882 | $169,882 | $782,000 |
80129 | Littleton , CO | Standard | 30,223 | $141,667 | $663,800 |
80130 | Littleton , CO | Standard | 24,719 | $158,741 | $691,800 |
80131 | Louviers , CO | Standard | 276 | $107,250 | $427,500 |
80134 | Parker , CO | Standard | 80,302 | $146,778 | $677,700 |
80135 | Sedalia , CO | Standard | 4,141 | $136,083 | $880,500 |
80138 | Parker , CO | Standard | 36,895 | $145,013 | $723,600 |
80163 | Littleton , CO | No street area | — | — | — |
Cite this page
zipcodes.pro. “Douglas County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/co/county/douglas
Underlying data is public domain or openly licensed — sources, vintages and licences.