80304 ZIP Code — Boulder, CO

Boulder County, Colorado

ZIP code 80304 is located in Boulder, Colorado, within Boulder County. It covers approximately 9.03 square miles and serves a population of 25,617 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 303.

About ZIP code 80304

The housing stock consists of a mix of housing types. Most homes were built in the 1970s, giving the area an established character. Median home value is $1,059,900. Owner-occupancy sits near the national average at 69%.

The gap between median ($111,638) and mean household income suggests income inequality — a small number of higher earners pull the average up.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 18 minutes is near the national average. Remote work is prevalent — 30% of workers work from home.

Educational attainment is high — 75% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 80304 reflects a community defined by a highly educated population and a high rate of remote workers.

25,617

population

9.03

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

80304 ZIP code map

Cities in ZIP code 80304

Below are the cities the US Postal Service accepts for ZIP code 80304. Using any city not on this list may result in mail delivery delays.

City	Status
Boulder	Preferred

Nearby ZIP codes

80314 Boulder (2.4 mi) 80310 Boulder (2.4 mi) 80309 Boulder (3 mi) 80301 Boulder (4.5 mi) 80302 Boulder (4.7 mi) 80305 Boulder (5.2 mi) 80303 Boulder (7.2 mi) 80455 Jamestown (7.7 mi) 80027 Louisville (9.4 mi) 80026 Lafayette (10 mi) 80503 Longmont (10.4 mi) 80503 Longmont (10.4 mi)

Demographics updated 05/2026

Population
Total population	25,617
Population density	2,837 / sq mi
State FIPS	08
County FIPS	013

Geography
Land area	9.03 sq mi
Water area	0.05 sq mi
Latitude	40.0452
Longitude	-105.2920
Timezone	Mountain (MT)
Area code	303

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.2%	29.3%	32.5%
$50k – $100k	24.3%	25.4%	31.0%
$100k – $200k	26.4%	29.1%	26.9%
Over $200k	23.1%	16.2%	9.6%

Demographics & statistics

25,617

Population

2,837

People per sq mi

41.4

Median age

$111,638

Median household income

$78,091

Per capita income

$1,059,900

Median home value

$1,948

Median monthly rent

68.9%

Home ownership

8.5%

Poverty rate

5.0%

Unemployment

8,162

Housing units

75.1%

Bachelor's or higher

Age distribution

Male Female

407

Under 5

410

612

5–9

616

680

10–14

683

967

15–19

971

698

20–24

702

2,025

25–34

2,035

1,482

35–44

1,490

2,043

45–54

2,054

961

55–59

965

765

60–64

768

1,461

65–74

1,469

472

75–84

474

203

85+

204

← Male

Female →

Age summary

Group	Count	%
Under 18	4,568	17.8%
18 and over	21,049	82.2%
65 and over	4,283	16.7%
Median age	41.4 years

Race & ethnicity

White 78.1%

Hispanic or Latino 7.8%

Two or more races 7%

Other race 3.3%

Asian 3.1%

American Indian / Alaska Native 0.5%

Black or African American 0.2%

Group	Count	%
White	21,700	78.1%
Hispanic or Latino	2,162	7.8%
Two or more races	1,949	7%
Other race	920	3.3%
Asian	857	3.1%
American Indian / Alaska Native	137	0.5%
Black or African American	54	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.2%	29.3%	32.5%
$50k – $100k	24.3%	25.4%	31.0%
$100k – $200k	26.4%	29.1%	26.9%
Over $200k	23.1%	16.2%	9.6%

Under $10k 3.1%

$10k–$15k 2.7%

$15k–$25k 4.4%

$25k–$35k 5.1%

$35k–$50k 6.6%

$50k–$75k 12.4%

$75k–$100k 11.1%

$100k–$150k 17.0%

$150k–$200k 11.6%

$200k+ 25.9%

Range	% of households
Under $10k	3.1%
$10k–$15k	2.7%
$15k–$25k	4.4%
$25k–$35k	5.1%
$35k–$50k	6.6%
$50k–$75k	12.4%
$75k–$100k	11.1%
$100k–$150k	17.0%
$150k–$200k	11.6%
$200k+	25.9%
Median income	$111,638

Housing

Home values

Under $50k 4.1%

$50k–$100k 2.2%

$100k–$150k 1.6%

$150k–$200k 2.4%

$200k–$300k 4.4%

$300k–$500k 3.6%

$500k–$1M 28.4%

$1M+ 53.3%

Housing overview

Metric	Value
Median home value	$1,059,900
Median rent / month	$1,948
Owner occupied	68.9%
Renter occupied	31.1%
Vacant	4.4%
Single-family detached	54.5%
Large apartment buildings	9.5%
Mobile homes	4.6%
Median rooms	5.8
Avg household size (owned)	2.31

Year built

Era	%
2020 or later	0.0%
2010–2019	8.4%
2000–2009	12.5%
1990–1999	10.8%
1980–1989	15.3%
1970–1979	17.4%
1960–1969	12.8%
1950–1959	12.8%
1940–1949	1.9%
1939 or earlier	8.1%

Bedrooms

Size	% of units
No bedroom (studio)	2.0%
1 bedroom	10.3%
2 bedrooms	27.3%
3 bedrooms	32.4%
4 bedrooms	19.4%
5+ bedrooms	8.7%

Vehicles per household

Vehicles	% of households
No vehicle	4.3%
1 vehicle	38.6%
2 vehicles	40.4%
3 or more	16.7%

Heating fuel

Fuel type	%
Utility gas	71.9%
Electricity	25.1%
Propane / LP gas	1.2%
Fuel oil	0.1%
Wood	0.2%
Solar	1.5%

Households & families

Household type	Count	%
Married-couple family	4,905	44.2%
Cohabiting couple	1,122	10.1%
Male householder, no spouse	2,377	21.4%
Female householder, no spouse	2,697	24.3%
Households with children under 18	2,801	25.2%
Households with seniors (65+)	3,259	29.4%
Average household size	2.27

Marital status

Status	Male	Female
Never married	37.1%	32.0%
Married	44.5%	47.4%
Separated	0.8%	0.8%
Widowed	1.6%	4.3%
Divorced	15.9%	15.4%

Education

Less than 9th grade 2.5%

Some HS, no diploma 2.8%

HS graduate 6.8%

Some college, no degree 8.8%

Associate's degree 3.9%

Bachelor's degree 33.5%

Graduate / professional 41.6%

Metric	%
HS diploma or higher	94.7%
Bachelor's or higher	75.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	299	4.8%
Kindergarten	242	3.9%
Elementary school	2,179	35.1%
High school	1,478	23.8%
College / grad school	2,013	32.4%

Employment

Industry of employment

Education & healthcare 25.0%

Professional & management 20.3%

Arts, food & hospitality 9.8%

Finance & real estate 8.4%

Manufacturing 8.2%

Retail trade 8.2%

Information 4.9%

Other services 3.3%

Construction 3.2%

Public administration 3.2%

Transportation & utilities 2.4%

Wholesale trade 2.1%

Agriculture & mining 1.0%

Occupation

Category	%
Management, business & arts	62.4%
Service	10.4%
Sales & office	18.8%
Natural resources & construction	4.2%
Production & transportation	4.2%

Employment type

Type	%
Private sector	74.2%
Government	13.2%
Self-employed	12.3%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	45.0%
Carpool	3.4%
Public transit	7.1%
Walk	5.3%
Work from home	29.6%
Other means	9.7%
Avg commute (minutes)	18.3

Poverty

All people 8.5%

Under 18 years 8.7%

18 and over 8.5%

Married-couple families 1.7%

Female-led households 25.1%

Income support

Source	% of households
Social Security	24.6%
Retirement income	20.0%
Supplemental Security	2.2%
Cash public assistance	2.5%
Food stamps / SNAP	6.5%

Health indicators

Condition	%
Obesity	17.0%
High blood pressure	20.2%
High cholesterol	27.2%
Diabetes	5.4%
Heart disease	4.0%
Stroke	1.8%
Asthma	9.4%
Arthritis	17.0%
Kidney disease	2.0%
Pulmonary disease	3.7%
Cancer	6.0%

Behavior / access	%
Smoking	10.1%
Binge drinking	19.6%
No physical activity	10.8%
Less than 7 hrs sleep	23.4%
Depression	19.0%
Fair or poor health	7.2%
Poor mental health	12.3%
Poor physical health	6.6%
No health insurance	8.4%
Visited doctor (checkup)	65.1%
Visited dentist	75.0%
Cholesterol screening	91.3%
Teeth loss	5.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	835	4.0%

Disability	%
Any disability	8.2%
Under 18	3.4%
18–64 years	7.6%
65 and over	15.5%

Health insurance coverage

Type	%
Private insurance	76.8%
Public insurance	29.5%
No insurance	5.7%
Uninsured under 19	2.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	24,800	96.8%
Spanish	1,192	4.8%
Other Indo-European	847	3.4%
Asian & Pacific Islander	210	0.8%
Other languages	135	0.5%

Place of birth & citizenship

Origin	Count	%
Native born (US)	22,870	89.3%
Born in same state	22,471	87.7%
Born in different state	7,280	28.4%
Foreign born	399	1.6%
Naturalized citizen	2,747	10.7%
Not a US citizen	1,285	46.8%

Ancestry

Ancestry	Count	%
Italian	3,160	12.3%
French	2,945	11.5%
Arab	775	3%
Polish	431	1.7%
English	354	1.4%

Ancestry	Count	%
Dutch	200	0.8%
Norwegian	147	0.6%
Irish	139	0.5%
German	137	0.5%

Technology access

Metric	% of households
Computer access	43.3%
Internet access	98.4%

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

Frequently asked questions about ZIP code 80304

What city is ZIP code 80304 in?

ZIP code 80304 is primarily assigned to Boulder, Colorado.

What county is ZIP code 80304 in?

ZIP code 80304 falls within Boulder County, Colorado.

How educated is the population of ZIP code 80304?

75% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the typical home value in ZIP code 80304?

The median home value in ZIP code 80304 is $1,059,900.

What is the median household income in ZIP code 80304?

The median household income in ZIP code 80304 is $111,638, above the national median of ~$75,000.

What is the population of ZIP code 80304?

ZIP code 80304 has an estimated population of 25,617 residents, with a density of 2,838 people per square mile.

What timezone is ZIP code 80304 in?

ZIP code 80304 observes the MST timezone.