ZIP Code Tabulation Area · Colorado

ZIP Code 80109: Castle Rock, CO

ZIP Code 80109 (Castle Rock, Douglas County, Colorado) has an estimated 28,400 residents in 9,728 households. The median household income is $155,025, the median home value is $675,500 and the median gross rent is $2,304/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

28,400

Margin of error ±1,671

Median household income

$155,025

Margin of error ±$8,586

Median home value

$675,500

Margin of error ±$15,584

Median gross rent

$2,304/mo

Margin of error ±$141

Median age

36.9 yrs

Margin of error ±1.9 yrs

Mean travel time to work

26.8 min

Margin of error ±4.3 min

How ZIP 80109 compares with Colorado and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 8010936.9 yrsColorado37.7 yrsUnited States38.9 yrs

Median household income

ZIP 80109$155,025Colorado$95,470United States$80,734

Per capita income

ZIP 80109$62,169Colorado$52,636United States$44,673

Poverty rate

ZIP 801093.3%Colorado9.4%United States12.5%

Unemployment rate

ZIP 801096.2%Colorado4.6%United States5.2%

Bachelor's degree or higher

ZIP 8010957.8%Colorado45.7%United States35.7%

Median home value

ZIP 80109$675,500Colorado$539,400United States$332,700

Median gross rent

ZIP 80109$2,304/moColorado$1,761/moUnited States$1,413/mo

Owner-occupied homes

ZIP 8010981.4%Colorado66.2%United States65.2%

Mean travel time to work

ZIP 8010926.8 minColorado25.2 minUnited States26.4 min

Worked from home

ZIP 8010931.7%Colorado21.0%United States15.1%

All figures for ZIP 80109

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 80109 — ACS 2020–2024 5-year estimates
Measure	ZIP 80109	Margin of error	Colorado	United States
Total population	28,400	±1,671	5,862,189	334,922,499
Median age	36.9 yrs	±1.9 yrs	37.7 yrs	38.9 yrs
Households	9,728	±566	2,374,218	129,227,496
Median household income	$155,025	±$8,586	$95,470	$80,734
Per capita income	$62,169	±$4,069	$52,636	$44,673
Poverty rate	3.3%	±1.7 pts	9.4%	12.5%
Unemployment rate	6.2%	±2.5 pts	4.6%	5.2%
Bachelor's degree or higher	57.8%	±3.7 pts	45.7%	35.7%
Median home value	$675,500	±$15,584	$539,400	$332,700
Median gross rent	$2,304/mo	±$141	$1,761/mo	$1,413/mo
Owner-occupied homes	81.4%	±4.0 pts	66.2%	65.2%
Mean travel time to work	26.8 min	±4.3 min	25.2 min	26.4 min
Worked from home	31.7%	±3.9 pts	21.0%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 80109
Group	ZIP 80109	Colorado	United States
White alone, not Hispanic or Latino	78.9%	64.8%	57.4%
Black or African American alone, not Hispanic or Latino	1.0%	3.8%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.0%	0.4%	0.5%
Asian alone, not Hispanic or Latino	2.4%	3.2%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.2%	0.1%	0.2%
Some other race alone, not Hispanic or Latino	0.9%	0.5%	0.6%
Two or more races, not Hispanic or Latino	5.5%	4.6%	4.3%
Hispanic or Latino (of any race)	11.1%	22.5%	19.3%

Where ZIP 80109 is

State: Colorado
Main county: Douglas County
Largest overlapping place: Castle Rock (49% of the ZIP's land area)
Land area: 25.99 sq mi· about 1,093 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Douglas County

80104 Douglas County, CO 80108 Castle Pines, CO 80116 Douglas County, CO 80118 Douglas County, CO 80124 Lone Tree, CO 80125 Roxborough Park, CO 80126 Highlands Ranch, CO 80129 Highlands Ranch, CO 80130 Highlands Ranch, CO 80131 Louviers, CO 80134 Parker, CO 80135 Douglas County, CO 80138 Douglas County, CO

See every ZIP code in Colorado, or compare ZIP 80109 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.