Castle Rock, CO · standard
ZIP Code 80109
Douglas County, Colorado - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 17,219
- 252/sq mi High-density area
- $155,025
- Median income Above-median income area
- $675,500
- Median home value Above-median home value
- 57.8%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Castle Rock pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.
- Top 3%
- household income, US ZIPs
- Top 7%
- home value, US ZIPs
- 252
- people per sq mi
- 81%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 80109 against every reporting US ZIP.
ZIP code 80109 is a mid-sized community (a standard USPS delivery area) in Castle Rock, Douglas County, Colorado, home to 17,219 residents across 68.3 square miles, a density of 252 people per square mile, in the Denver time zone.
ZIP 80109 skews affluent, with a median household income of $155,025 (75% above the average Colorado ZIP), while per-capita income is $62,169. The poverty rate is 3.3%, with unemployment at 6.2%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $675,500 (39% above the average Colorado ZIP), while 81.4% of occupied homes are owner-occupied and median rent is $2,304.
This is a highly-educated ZIP: 57.8% of adults hold a bachelor's degree or higher, the median age is 36.9, and the average commute is 27 minutes. The page also surfaces 5 ZIP codes within roughly 10 miles and 6 more in Douglas County, so 80109 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 80109
Top 5 sectors by establishment count in Castle Rock, CO
Which industries have the most business establishments in ZIP 80109.
- Professional, scientific, and technical services
Professional, scientific, and technical services
113 establishments
- Health care and social assistance
Health care and social assistance
84 establishments
- Construction
Construction
83 establishments
- Other services (except public administration)
Other services (except public administration)
69 establishments
- Real estate and rental and leasing
Real estate and rental and leasing
54 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 80109, Castle Rock, CO · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
17,219
Population
68.3
Area (sq mi)
252
People / sq mi
Denver
Time Zone
standard
ZIP Type
Who lives in ZIP 80109?
36.9
Median Age
49.9%
Male
50.1%
Female
5.4%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$155,025
Median Household Income
+75% vs state ZIP avg
$62,169
Per Capita Income
3.3%
Poverty Rate
6.2%
Unemployment Rate
26.8 min
Mean Commute Time
How ZIP 80109 ranks among Colorado ZIPs
Castle Rock, CO household income vs. every Colorado ZIP code
Median household income among 469 reporting Colorado ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$155,025 Top 4% higher than 96% of 469 Colorado ZIPs
Each bar is a $20K-wide band; taller bars hold more Colorado ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
9,873housing units
9,873
Total Housing Units
9,728
Occupied Units
145
Vacant Units
2.88
Avg Household Size
Occupancy Type
$675,500
Median Home Value
+39% vs state ZIP avg
$2,304
Median Rent
2007
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+23.2%
YoY Change (2024)
255
HPI Index (2000 = 100)
+155%
Total Change Since 2000
Home values in ZIP 80109 have increased 23.2% over the past year (2024). Since 2000, this ZIP has seen +155% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2019 | +1.9% | 186 |
| 2020 | -0.0% | 186 |
| 2021 | +11.0% | 207 |
| 2022 | +23.2% | 255 |
| 2024 | – | 255 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 644 business establishments in ZIP 80109, employing approximately 5,224 people with a combined annual payroll of $290,812,000.
644
Businesses
5,224
Employees
$290.8M
Annual Payroll
17
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 113 | 17.6% |
| Health care and social assistance | 84 | 13.0% |
| Construction | 83 | 12.9% |
| Other services (except public administration) | 69 | 10.7% |
| Real estate and rental and leasing | 54 | 8.4% |
| Retail trade | 43 | 6.7% |
| Finance and insurance | 36 | 5.6% |
| Administrative and support and waste management and remediation services | 31 | 4.8% |
| Wholesale trade | 25 | 3.9% |
| Accommodation and food services | 25 | 3.9% |
| Educational services | 23 | 3.6% |
| Manufacturing | 16 | 2.5% |
| Arts, entertainment, and recreation | 15 | 2.3% |
| Information | 11 | 1.7% |
| Transportation and warehousing | 6 | 0.9% |
| Mining, quarrying, and oil and gas extraction | 3 | 0.5% |
| Utilities | 3 | 0.5% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 80109 vs 80108 →
ZIP 80109 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 80134
Parker (80134)
55,075 residents
- 80104
Castle Rock (80104)
27,588 residents
- 80108
Castle Rock (80108)
22,612 residents
- 80109 17,219
Castle Rock (80109)
17,219 residents
- 80125 10,190
Littleton (80125)
10,190 residents
- 80131 243
Louviers (80131)
243 residents
What this shows Among its immediate neighbors, ZIP 80109 ranks #4 by population - useful context the national average alone can't give.
ZIP 80109 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 80108
Castle Rock (80108)
$181,049 median income
- 80125
Littleton (80125)
$179,983 median income
- 80109
Castle Rock (80109)
$155,025 median income
- 80134
Parker (80134)
$146,778 median income
- 80104
Castle Rock (80104)
$134,335 median income
- 80131
Louviers (80131)
$107,250 median income
What this shows By household income, ZIP 80109 ranks #3 of 6 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 80109, both outside CO so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (17,219 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Douglas County
Related Areas
Frequently Asked Questions
What county is ZIP code 80109 in?
ZIP code 80109 (Castle Rock) is located in Douglas County, Colorado. Douglas County contains multiple ZIP codes, see the full list at /counties/douglas-co.
What is the population of ZIP code 80109?
ZIP code 80109 in Castle Rock, CO has a population of 17,219 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 80109?
The median household income in ZIP 80109 is $155,025, which is 103% above the national average of $76,288.
What is the average home value in ZIP 80109?
The median home value in ZIP 80109 is $675,500, which is 143% above the national average of $278,155.
What is the demographic makeup of ZIP 80109?
The largest racial group in ZIP 80109 is White at 83.1%. Hispanic or Latino residents make up 11.1% of the population.
How many businesses are in ZIP code 80109?
ZIP code 80109 has 644 business establishments employing approximately 5,224 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 80109?
The top industries by establishment count in ZIP 80109 are: Professional, scientific, and technical services (113), Health care and social assistance (84), Construction (83). There are 17 industry sectors represented in total.
How have home values changed in ZIP code 80109?
According to the FHFA House Price Index, home values in ZIP 80109 increased by 23.2% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 155%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 80109?
In ZIP code 80109, 70.0% of residents aged 25+ have a high school diploma or higher, and 57.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 80109?
The mean commute time for workers in ZIP code 80109 is 26.8 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 80109?
In ZIP code 80109, approximately 81.4% of occupied housing units are owner-occupied and 18.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 80109?
The poverty rate in ZIP code 80109 is 3.3% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 80109's numbers, next.
- See how ZIP 80109 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Castle Rock, CO ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.