80305 ZIP Code — Boulder, CO

Boulder County, Colorado

ZIP code 80305 is located in Boulder, Colorado, within Boulder County. It covers approximately 5.82 square miles and serves a population of 16,280 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 303.

About ZIP code 80305

The housing stock consists of a mix of housing types. Most homes were built in the 1960s, giving the area an established character. Median home value is $924,200. Owner-occupancy sits near the national average at 61%.

The gap between median ($114,344) 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 22 minutes is near the national average. Remote work is prevalent — 36% of workers work from home.

Educational attainment is high — 83% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 80305 reflects a community defined by a highly educated population and a high rate of remote workers.

16,280

population

5.82

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

80305 ZIP code map

Cities in ZIP code 80305

Below are the cities the US Postal Service accepts for ZIP code 80305. Using any city not on this list may result in mail delivery delays.

City	Status
Boulder	Preferred

Nearby ZIP codes

80303 Boulder (2.1 mi) 80309 Boulder (2.2 mi) 80310 Boulder (2.9 mi) 80314 Boulder (2.9 mi) 80304 Boulder (5.2 mi) 80027 Louisville (5.2 mi) 80301 Boulder (5.6 mi) 80021 Broomfield (8 mi) 80021 Broomfield (8 mi) 80302 Boulder (8.4 mi) 80026 Lafayette (8.5 mi) 80007 Arvada (8.7 mi)

Demographics updated 05/2026

Population
Total population	16,280
Population density	2,797 / sq mi
State FIPS	08
County FIPS	013

Geography
Land area	5.82 sq mi
Water area	0.05 sq mi
Latitude	39.9756
Longitude	-105.2536
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	25.0%	29.3%	32.5%
$50k – $100k	25.1%	25.4%	31.0%
$100k – $200k	29.2%	29.1%	26.9%
Over $200k	20.7%	16.2%	9.6%

Demographics & statistics

16,280

Population

2,797

People per sq mi

36.8

Median age

$114,344

Median household income

$69,036

Per capita income

$924,200

Median home value

$2,161

Median monthly rent

61.1%

Home ownership

12.7%

Poverty rate

4.6%

Unemployment

4,463

Housing units

83.3%

Bachelor's or higher

Age distribution

Male Female

278

Under 5

270

445

5–9

434

440

10–14

428

603

15–19

588

1,025

20–24

999

1,156

25–34

1,126

1,032

35–44

1,005

1,171

45–54

1,142

427

55–59

417

437

60–64

426

705

65–74

687

422

75–84

412

104

85+

101

← Male

Female →

Age summary

Group	Count	%
Under 18	2,940	18.1%
18 and over	13,340	81.9%
65 and over	2,431	14.9%
Median age	36.8 years

Race & ethnicity

White 80.4%

Two or more races 6.8%

Asian 5.7%

Hispanic or Latino 4.6%

Black or African American 1.1%

Other race 0.9%

American Indian / Alaska Native 0.4%

Native Hawaiian / Pacific Islander 0.1%

Group	Count	%
White	13,730	80.4%
Two or more races	1,155	6.8%
Asian	967	5.7%
Hispanic or Latino	791	4.6%
Black or African American	180	1.1%
Other race	161	0.9%
American Indian / Alaska Native	67	0.4%
Native Hawaiian / Pacific Islander	20	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	25.0%	29.3%	32.5%
$50k – $100k	25.1%	25.4%	31.0%
$100k – $200k	29.2%	29.1%	26.9%
Over $200k	20.7%	16.2%	9.6%

Under $10k 5.4%

$10k–$15k 3.0%

$15k–$25k 6.1%

$25k–$35k 2.8%

$35k–$50k 6.9%

$50k–$75k 9.9%

$75k–$100k 10.7%

$100k–$150k 15.9%

$150k–$200k 11.6%

$200k+ 27.9%

Range	% of households
Under $10k	5.4%
$10k–$15k	3.0%
$15k–$25k	6.1%
$25k–$35k	2.8%
$35k–$50k	6.9%
$50k–$75k	9.9%
$75k–$100k	10.7%
$100k–$150k	15.9%
$150k–$200k	11.6%
$200k+	27.9%
Median income	$114,344

Housing

Home values

Under $50k 1.8%

$50k–$100k 1.2%

$100k–$150k 0.6%

$150k–$200k 0.3%

$200k–$300k 0.2%

$300k–$500k 5.4%

$500k–$1M 50.4%

$1M+ 40.1%

Housing overview

Metric	Value
Median home value	$924,200
Median rent / month	$2,161
Owner occupied	61.1%
Renter occupied	38.9%
Vacant	3.9%
Single-family detached	63.5%
Large apartment buildings	13.1%
Mobile homes	1.0%
Median rooms	6.0
Avg household size (owned)	2.37

Year built

Era	%
2020 or later	0.0%
2010–2019	4.0%
2000–2009	1.3%
1990–1999	7.2%
1980–1989	9.5%
1970–1979	28.2%
1960–1969	31.4%
1950–1959	16.3%
1940–1949	0.6%
1939 or earlier	1.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	8.9%
2 bedrooms	21.9%
3 bedrooms	28.8%
4 bedrooms	29.1%
5+ bedrooms	10.8%

Vehicles per household

Vehicles	% of households
No vehicle	4.9%
1 vehicle	33.7%
2 vehicles	41.0%
3 or more	20.4%

Heating fuel

Fuel type	%
Utility gas	64.3%
Electricity	32.7%
Propane / LP gas	0.6%
Fuel oil	0.2%
Wood	0.4%
Solar	1.2%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	2,990	43.6%
Cohabiting couple	442	6.4%
Male householder, no spouse	1,654	24.1%
Female householder, no spouse	1,767	25.8%
Households with children under 18	1,662	24.3%
Households with seniors (65+)	1,848	27.0%
Average household size	2.37

Marital status

Status	Male	Female
Never married	48.3%	40.6%
Married	43.8%	44.3%
Separated	0.9%	0.3%
Widowed	1.7%	3.1%
Divorced	5.3%	11.6%

Education

Less than 9th grade 0.6%

Some HS, no diploma 0.2%

HS graduate 4.4%

Some college, no degree 8.1%

Associate's degree 3.5%

Bachelor's degree 37.8%

Graduate / professional 45.5%

Metric	%
HS diploma or higher	99.2%
Bachelor's or higher	83.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	243	4.9%
Kindergarten	79	1.6%
Elementary school	1,536	31.2%
High school	800	16.2%
College / grad school	2,270	46.1%

Employment

Industry of employment

Education & healthcare 30.5%

Professional & management 21.8%

Arts, food & hospitality 9.9%

Retail trade 7.3%

Manufacturing 6.6%

Finance & real estate 5.2%

Other services 4.5%

Public administration 3.8%

Construction 3.3%

Information 2.7%

Transportation & utilities 2.6%

Wholesale trade 1.2%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	71.3%
Service	11.2%
Sales & office	11.0%
Natural resources & construction	2.0%
Production & transportation	4.5%

Employment type

Type	%
Private sector	69.9%
Government	20.2%
Self-employed	9.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	41.3%
Carpool	3.9%
Public transit	7.9%
Walk	1.4%
Work from home	36.4%
Other means	9.1%
Avg commute (minutes)	21.6

Poverty

All people 12.7%

Under 18 years 4.7%

18 and over 14.5%

Married-couple families 1.8%

Female-led households 9.4%

Income support

Source	% of households
Social Security	22.2%
Retirement income	21.0%
Supplemental Security	1.2%
Cash public assistance	2.1%
Food stamps / SNAP	4.4%

Health indicators

Condition	%
Obesity	15.8%
High blood pressure	18.6%
High cholesterol	25.3%
Diabetes	4.8%
Heart disease	3.7%
Stroke	1.7%
Asthma	9.3%
Arthritis	15.4%
Kidney disease	1.9%
Pulmonary disease	3.3%
Cancer	5.6%

Behavior / access	%
Smoking	9.4%
Binge drinking	20.6%
No physical activity	10.3%
Less than 7 hrs sleep	22.9%
Depression	19.0%
Fair or poor health	6.6%
Poor mental health	12.6%
Poor physical health	6.1%
No health insurance	8.1%
Visited doctor (checkup)	64.3%
Visited dentist	75.0%
Cholesterol screening	89.0%
Teeth loss	5.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	640	4.8%

Disability	%
Any disability	6.7%
Under 18	5.5%
18–64 years	4.7%
65 and over	17.1%

Health insurance coverage

Type	%
Private insurance	86.7%
Public insurance	23.1%
No insurance	1.8%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	15,732	96.6%
Spanish	197	1.3%
Other Indo-European	27	0.2%
Asian & Pacific Islander	61	0.4%
Other languages	98	0.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	14,900	91.5%
Born in same state	14,485	89.0%
Born in different state	4,926	30.3%
Foreign born	415	2.5%
Naturalized citizen	1,380	8.5%
Not a US citizen	748	54.2%

Ancestry

Ancestry	Count	%
French	2,382	14.6%
Italian	1,728	10.6%
Arab	503	3.1%
Dutch	373	2.3%
English	329	2%

Ancestry	Count	%
Polish	286	1.8%
Norwegian	259	1.6%
Irish	90	0.6%
German	87	0.5%

Technology access

Metric	% of households
Computer access	42.1%
Internet access	98.7%

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

Frequently asked questions about ZIP code 80305

What city is ZIP code 80305 in?

ZIP code 80305 is primarily assigned to Boulder, Colorado.

What county is ZIP code 80305 in?

ZIP code 80305 falls within Boulder County, Colorado.

How educated is the population of ZIP code 80305?

83% 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 80305?

The median home value in ZIP code 80305 is $924,200.

What is the median household income in ZIP code 80305?

The median household income in ZIP code 80305 is $114,344, above the national median of ~$75,000.

What is the population of ZIP code 80305?

ZIP code 80305 has an estimated population of 16,280 residents, with a density of 2,797 people per square mile.

What timezone is ZIP code 80305 in?

ZIP code 80305 observes the MST timezone.