80104 ZIP Code — Castle Rock, CO

Douglas County, Colorado

ZIP code 80104 is located in Castle Rock, Colorado, within Douglas County. It covers approximately 70.67 square miles and serves a population of 35,084 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 720/303.

About ZIP code 80104

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $518,500. Owner-occupancy is high at 79%, well above the national average.

Median household income is $123,337. The poverty rate of 5% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 29 minutes is near the national average. Remote work is prevalent — 21% of workers work from home.

Educational attainment is high — 51% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 80104 reflects a community defined by a highly educated population, high homeownership, and a high rate of remote workers.

35,084

population

70.67

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

80104 ZIP code map

Cities in ZIP code 80104

Below are the cities the US Postal Service accepts for ZIP code 80104. Using any city not on this list may result in mail delivery delays.

City	Status
Castle Rock	Preferred

Nearby ZIP codes

80116 Franktown (5.1 mi) 80118 Larkspur (6.2 mi) 80109 Castle Rock (6.5 mi) 80108 Castle Rock (9.6 mi) 80134 Parker (13.1 mi) 80133 Palmer Lake (13.7 mi) 80132 Monument (14.8 mi) 80138 Parker (15.7 mi) 80124 Lone Tree (15.9 mi) 80107 Elizabeth (16.2 mi) 80130 Littleton (17.2 mi) 80126 Littleton (17.3 mi)

Demographics updated 05/2026

Population
Total population	35,084
Population density	496 / sq mi
State FIPS	08
County FIPS	035

Geography
Land area	70.67 sq mi
Water area	0.00 sq mi
Latitude	39.3039
Longitude	-104.8215
Timezone	Mountain (MT)
Area code	720/303

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	20.6%	14.5%	32.5%
$50k – $100k	28.7%	24.3%	31.0%
$100k – $200k	36.9%	39.5%	26.9%
Over $200k	13.9%	21.8%	9.6%

Demographics & statistics

35,084

Population

496

People per sq mi

37.8

Median age

$123,337

Median household income

$53,266

Per capita income

$518,500

Median home value

$1,752

Median monthly rent

78.7%

Home ownership

4.6%

Poverty rate

4.3%

Unemployment

10,651

Housing units

50.9%

Bachelor's or higher

Age distribution

Male Female

1,103

Under 5

1,162

1,122

5–9

1,183

1,035

10–14

1,090

1,154

15–19

1,216

1,162

20–24

1,224

2,286

25–34

2,409

2,532

35–44

2,668

2,340

45–54

2,465

1,135

55–59

1,197

1,043

60–64

1,099

1,312

65–74

1,382

697

75–84

735

162

85+

171

← Male

Female →

Age summary

Group	Count	%
Under 18	8,399	23.9%
18 and over	26,685	76.1%
65 and over	4,459	12.7%
Median age	37.8 years

Race & ethnicity

White 83.9%

Two or more races 7%

Hispanic or Latino 4.9%

Asian 1.6%

Other race 1.4%

American Indian / Alaska Native 0.5%

Black or African American 0.5%

Native Hawaiian / Pacific Islander 0.2%

Group	Count	%
White	30,950	83.9%
Two or more races	2,594	7%
Hispanic or Latino	1,798	4.9%
Asian	600	1.6%
Other race	515	1.4%
American Indian / Alaska Native	194	0.5%
Black or African American	169	0.5%
Native Hawaiian / Pacific Islander	62	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	20.6%	14.5%	32.5%
$50k – $100k	28.7%	24.3%	31.0%
$100k – $200k	36.9%	39.5%	26.9%
Over $200k	13.9%	21.8%	9.6%

Under $10k 3.1%

$10k–$15k 1.2%

$15k–$25k 2.3%

$25k–$35k 4.7%

$35k–$50k 5.7%

$50k–$75k 10.5%

$75k–$100k 12.5%

$100k–$150k 22.7%

$150k–$200k 17.4%

$200k+ 19.9%

Range	% of households
Under $10k	3.1%
$10k–$15k	1.2%
$15k–$25k	2.3%
$25k–$35k	4.7%
$35k–$50k	5.7%
$50k–$75k	10.5%
$75k–$100k	12.5%
$100k–$150k	22.7%
$150k–$200k	17.4%
$200k+	19.9%
Median income	$123,337

Housing

Home values

Under $50k 1.4%

$100k–$150k 0.4%

$150k–$200k 1.0%

$200k–$300k 3.6%

$300k–$500k 41.1%

$500k–$1M 45.9%

$1M+ 6.7%

Housing overview

Metric	Value
Median home value	$518,500
Median rent / month	$1,752
Owner occupied	78.7%
Renter occupied	21.3%
Vacant	3.2%
Single-family detached	73.7%
Large apartment buildings	6.7%
Mobile homes	0.3%
Median rooms	7.0
Avg household size (owned)	2.82

Year built

Era	%
2020 or later	2.5%
2010–2019	17.4%
2000–2009	34.3%
1990–1999	20.0%
1980–1989	12.3%
1970–1979	8.4%
1960–1969	2.2%
1950–1959	1.3%
1940–1949	0.6%
1939 or earlier	1.1%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	6.1%
2 bedrooms	16.1%
3 bedrooms	33.4%
4 bedrooms	29.7%
5+ bedrooms	14.0%

Vehicles per household

Vehicles	% of households
No vehicle	1.5%
1 vehicle	21.3%
2 vehicles	42.5%
3 or more	34.7%

Heating fuel

Fuel type	%
Utility gas	75.4%
Electricity	22.0%
Propane / LP gas	2.3%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	8,553	65.8%
Cohabiting couple	852	6.6%
Male householder, no spouse	1,457	11.2%
Female householder, no spouse	2,131	16.4%
Households with children under 18	4,795	36.9%
Households with seniors (65+)	3,109	23.9%
Average household size	2.68

Marital status

Status	Male	Female
Never married	25.8%	23.7%
Married	64.5%	59.4%
Separated	0.3%	0.6%
Widowed	1.0%	5.5%
Divorced	8.4%	10.9%

Education

Less than 9th grade 0.6%

Some HS, no diploma 2.5%

HS graduate 14.3%

Some college, no degree 22.4%

Associate's degree 9.3%

Bachelor's degree 34.2%

Graduate / professional 16.7%

Metric	%
HS diploma or higher	96.9%
Bachelor's or higher	50.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	512	5.9%
Kindergarten	553	6.4%
Elementary school	3,571	41.3%
High school	1,946	22.5%
College / grad school	2,067	23.9%

Employment

Industry of employment

Education & healthcare 20.3%

Finance & real estate 13.3%

Professional & management 13.2%

Retail trade 10.4%

Arts, food & hospitality 8.6%

Construction 7.7%

Public administration 5.6%

Manufacturing 5.4%

Transportation & utilities 4.7%

Information 3.4%

Other services 3.1%

Wholesale trade 3.0%

Agriculture & mining 1.3%

Occupation

Category	%
Management, business & arts	50.4%
Service	14.8%
Sales & office	22.0%
Natural resources & construction	5.9%
Production & transportation	6.9%

Employment type

Type	%
Private sector	80.7%
Government	12.3%
Self-employed	6.7%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	71.0%
Carpool	5.2%
Public transit	0.1%
Walk	1.8%
Work from home	21.1%
Other means	0.8%
Avg commute (minutes)	28.8

Poverty

All people 4.6%

Under 18 years 4.2%

18 and over 4.8%

Married-couple families 0.8%

Female-led households 28.9%

Income support

Source	% of households
Social Security	23.5%
Retirement income	22.5%
Supplemental Security	2.4%
Cash public assistance	1.8%
Food stamps / SNAP	4.5%

Health indicators

Condition	%
Obesity	21.9%
High blood pressure	22.7%
High cholesterol	29.8%
Diabetes	5.8%
Heart disease	3.9%
Stroke	1.9%
Asthma	9.5%
Arthritis	17.3%
Kidney disease	2.0%
Pulmonary disease	4.3%
Cancer	5.6%

Behavior / access	%
Smoking	12.5%
Binge drinking	20.7%
No physical activity	13.0%
Less than 7 hrs sleep	26.2%
Depression	18.6%
Fair or poor health	8.3%
Poor mental health	13.2%
Poor physical health	7.7%
No health insurance	10.5%
Visited doctor (checkup)	66.8%
Visited dentist	74.3%
Cholesterol screening	90.8%
Teeth loss	8.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,420	9.1%

Disability	%
Any disability	8.7%
Under 18	2.6%
18–64 years	7.2%
65 and over	28.0%

Health insurance coverage

Type	%
Private insurance	82.9%
Public insurance	23.2%
No insurance	4.8%
Uninsured under 19	4.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	32,819	93.5%
Spanish	360	1.1%
Other Indo-European	211	0.6%
Asian & Pacific Islander	18	0.1%
Other languages	121	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	33,757	96.2%
Born in same state	33,169	94.5%
Born in different state	13,516	38.5%
Foreign born	588	1.7%
Naturalized citizen	1,327	3.8%
Not a US citizen	859	64.7%

Ancestry

Ancestry	Count	%
French	5,854	16.7%
Italian	4,429	12.6%
Arab	1,056	3%
English	831	2.4%
Polish	801	2.3%

Ancestry	Count	%
Dutch	291	0.8%
Irish	112	0.3%
German	90	0.3%
Norwegian	34	0.1%

Technology access

Metric	% of households
Computer access	37.0%
Internet access	96.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 80104

What city is ZIP code 80104 in?

ZIP code 80104 is primarily assigned to Castle Rock, Colorado.

What county is ZIP code 80104 in?

ZIP code 80104 falls within Douglas County, Colorado.

How educated is the population of ZIP code 80104?

51% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 80104?

The median household income in ZIP code 80104 is $123,337, above the national median of ~$75,000.

What is the typical home value in ZIP code 80104?

The median home value in ZIP code 80104 is $518,500.

Does ZIP code 80104 have a large veteran population?

9% of civilians in ZIP code 80104 are veterans, above the national average of ~7%.

What timezone is ZIP code 80104 in?

ZIP code 80104 observes the MST timezone.