Zip Code 80104
Castle Rock, Colorado — Douglas County
📍 ZIP code 80104 is in Castle Rock, Douglas County, Colorado.
ZIP code 80104 is located in Castle Rock, Douglas County, Colorado. It is a zip code in the Mountain (MST/MDT) Time Zone with an estimated population of 36,461. The area code for ZIP code 80104 is 303.
Quick Answer
Zip code 80104 is in Castle Rock, Colorado (Douglas County). It has a population of 36,461, median household income of $131,359, and median home value of $586,800.
Population
36,461
Income
$131,359
Home Value
$586,800
Climate
86°F / 18°F
About Zip Code 80104
Zip code 80104 is located in Castle Rock, Colorado, within Douglas County. Home to approximately 36,461 residents, this area sits at an elevation of 6887 ft and falls within the Mountain (MST/MDT) timezone. The local area code is 303.
The median household income is $131,359 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $586,800, and the cost of living index is 177 (77% above the national average of 100).
Summers average a high of 86°F while winters drop to 18°F. The area receives about 18 in of rain and 58 in of snow annually. The zip code covers 77.6 square miles of land area.
Key Statistics
36,461
$131,359
$586,800
Mountain (MST/MDT)
303
6887 ft
77.6 sq mi
37
13,945
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Compare With Nearby Zip Codes
| Metric | 80104 | 80116 | 80118 | 80134 | 80132 | 80107 |
|---|---|---|---|---|---|---|
| City | Castle Rock, CO | Franktown, CO | Larkspur, CO | Parker, CO | Monument, CO | Elizabeth, CO |
| Population | 36,461 | 5,393 | 5,950 | 77,814 | 29,379 | 14,976 |
| Median Income | $131,359 | $151,250 | $153,368 | $142,162 | $155,176 | $137,886 |
| Home Value | $586,800 | $904,600 | $826,900 | $643,200 | $700,900 | $663,900 |
| Cost of Living | 177 | 244 | 250 | 201 | 214 | 205 |
| Median Age | 37 | 49.2 | 53.9 | 37.9 | 42.5 | 41.9 |
Cost of Living
100 = National Average. Castle Rock's cost of living is 77% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
4.5x
Demographics
Zip code 80104 has a population of 36,461 people with a median age of 37. There are 13,945 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Castle Rock (80104) population trend from 2010 to 2024
↑ 17.8%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
86°F
18°F
18 in
58 in
Castle Rock experiences warm summers with average highs around 86°F. Winters are cold with lows averaging 18°F. With 58 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$586,800
Median Household Income
$131,359
With 13,945 housing units across 77.6 square miles, 80104 has a housing density of 180 units per square mile. The home price-to-income ratio is 4.5x.
Location & Geography
Latitude
39.3019°
Longitude
-104.8181°
Land Area
77.6 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 80104 (Castle Rock, CO) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 80104's $131,359. A way to compare Castle Rock to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 80104 (Castle Rock, CO). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Castle Rock, Colorado?
Castle Rock, Colorado uses zip code 80104.
What county is zip code 80104 in?
Zip code 80104 is located in Douglas County, Colorado.
What is the population of zip code 80104?
The population of zip code 80104 is 36,461 with a median age of 37.
Is 80104 in Castle Rock, Colorado?
Yes, zip code 80104 is in Castle Rock, Douglas County, Colorado. The area code is 303.
Frequently Asked Questions
What city is zip code 80104 in?
Zip code 80104 is in Castle Rock, Colorado. It is part of Douglas County and uses the Mountain (MST/MDT) timezone.
What is zip code 80104?
Zip code 80104 is a U.S. postal code in Castle Rock, Colorado (Douglas County). It has a population of 36,461 and covers 77.6 square miles.
What is the population of zip code 80104?
The population of zip code 80104 (Castle Rock, CO) is 36,461 with a median age of 37. There are approximately 13,945 housing units in this area.
What is the median income in zip code 80104?
The median household income in zip code 80104 (Castle Rock, CO) is $131,359 per year. The cost of living index is 177 (100 = national average).
What is the average home price in zip code 80104?
The median home value in zip code 80104 (Castle Rock, CO) is $586,800. The cost of living index is 177 compared to the national average of 100.
What county is zip code 80104 in?
Zip code 80104 is located in Douglas County, Colorado. The primary city is Castle Rock.
What is the area code for zip code 80104?
Zip code 80104 in Castle Rock, CO uses area code 303. It is located in the Mountain (MST/MDT) timezone.
Is zip code 80104 a good place to live?
Zip code 80104 (Castle Rock, CO) has a cost of living index of 177 (100 = national average), a median household income of $131,359, and median home values of $586,800. The median age is 37. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 80104?
The cost of living index for zip code 80104 (Castle Rock, CO) is 177, where 100 represents the national average. This area is above the national average. Median home value: $586,800.
What schools serve zip code 80104?
Zip code 80104 in Castle Rock, Colorado is served by the local school district of Douglas County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.