PlainZIP

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
$155,025
Median income
$675,500
Median home value
57.8%
Bachelor's or higher

The verdict

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 Colorado average), while per-capita income is $62,169. Poverty here runs at 3.3%, with unemployment measured at 6.2%. Median home value sits at $675,500 (39% above the state average), median rent at $2,304 a month, and owner-occupancy at 81.4%.

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. A geography-based comparison follows: 5 ZIP codes within about 10 miles of 80109, plus 6 more within Douglas County, give a clearer read than the national average alone.

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.

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 · ZIP Code Business Patterns (ZBP) As of 2023

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

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 80109?

36.9

Median Age

49.9%

Male

50.1%

Female

5.4%

Foreign-Born

White 83.1%
African American 1.0%
Asian 2.4%
American Indian or Alaska Native 0.2%
Native Hawaiian or Pacific Islander 0.2%
Two or More Ethnicities 10.2%
Hispanic or Latino 11.1%

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

$62,169

Per Capita Income

3.3%

Poverty Rate

6.2%

Unemployment Rate

26.8 min

Mean Commute Time

How ZIP 80109 ranks nationally

Castle Rock, CO household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$155,025 Top 3% higher than 97% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). This entry sits in this band. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US 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?

High School Graduate or Higher 70.0%
Bachelor's Degree or Higher 57.8%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

9,873

Total Housing Units

9,728

Occupied Units

145

Vacant Units

2.88

Avg Household Size

Occupancy Type

Owner 81.4%
Renter 18.6%

$675,500

Median Home Value

+39% vs state

$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.

residents

What this shows Among its immediate neighbors, ZIP 80109 ranks #4 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 80109 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

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.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
80108 Castle Rock, CO 22,612 6.2 mi
80104 Castle Rock, CO 27,588 6.2 mi
80131 Louviers, CO 243 9.6 mi
80134 Parker, CO 55,075 10.4 mi
80125 Littleton, CO 10,190 11.6 mi

More ZIP Codes in Douglas County

80134 standard
Parker, CO
Pop: 55,075
80126 standard
Littleton, CO
Pop: 39,698
80138 standard
Parker, CO
Pop: 29,786
80104 standard
Castle Rock, CO
Pop: 27,588
80130 standard
Littleton, CO
Pop: 27,054
80129 standard
Littleton, CO
Pop: 27,007

Related Areas

Douglas County Castle Rock, CO Colorado

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.

Read our methodology to see how this data is sourced, computed, and verified.