02638 ZIP Code — Dennis, MA

Barnstable County, Massachusetts

ZIP code 02638 is located in Dennis, Massachusetts, within Barnstable County. It covers approximately 5.64 square miles and serves a population of 3,146 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 508/774.

About ZIP code 02638

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $661,100. Owner-occupancy is high at 82%, well above the national average.

The gap between median ($105,639) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 5% is below the national average. 59% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 27 minutes is near the national average. Remote work is prevalent — 29% of workers work from home.

Educational attainment is near the national average, with 39% of residents holding a bachelor's degree or higher.

Overall, ZIP code 02638 reflects a community defined by high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

3,146

population

5.64

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

02638 ZIP code map

Cities in ZIP code 02638

Below are the cities the US Postal Service accepts for ZIP code 02638. Using any city not on this list may result in mail delivery delays.

City	Status
Dennis	Preferred

Nearby ZIP codes

02675 Yarmouth Port (2.5 mi) 02660 South Dennis (2.6 mi) 02664 South Yarmouth (4.4 mi) 02670 West Dennis (5.3 mi) 02639 Dennis Port (5.4 mi) 02630 Barnstable (5.6 mi) 02671 West Harwich (6.3 mi) 02631 Brewster (6.7 mi) 02601 Hyannis (7.3 mi) 02645 Harwich (7.3 mi) 02668 West Barnstable (7.8 mi) 02646 Harwich Port (7.9 mi)

Demographics updated 06/2026

Population
Total population	3,146
Population density	558 / sq mi
State FIPS	25
County FIPS	001

Geography
Land area	5.64 sq mi
Water area	0.24 sq mi
Latitude	41.7343
Longitude	-70.1982
Timezone	Eastern (ET)
Area code	508/774

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	21.7%	31.6%	31.3%
$50k – $100k	38.9%	30.4%	25.9%
$100k – $200k	31.7%	27.2%	28.5%
Over $200k	7.7%	10.7%	14.3%

Demographics & statistics

3,146

Population

558

People per sq mi

61.5

Median age

$105,639

Median household income

$60,022

Per capita income

$661,100

Median home value

$1,514

Median monthly rent

82.2%

Home ownership

5.4%

Poverty rate

2.9%

Unemployment

2,796

Housing units

39.1%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

103

153

25–34

171

112

35–44

124

164

45–54

183

55–59

174

60–64

195

312

65–74

349

209

75–84

234

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	229	7.3%
18 and over	2,917	92.7%
65 and over	1,288	40.9%
Median age	61.5 years

Race & ethnicity

White 92.6%

Two or more races 2.2%

American Indian / Alaska Native 1.6%

Hispanic or Latino 1.3%

Asian 0.9%

Black or African American 0.8%

Other race 0.7%

Group	Count	%
White	2,950	92.6%
Two or more races	69	2.2%
American Indian / Alaska Native	51	1.6%
Hispanic or Latino	41	1.3%
Asian	28	0.9%
Black or African American	27	0.8%
Other race	21	0.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	21.7%	31.6%	31.3%
$50k – $100k	38.9%	30.4%	25.9%
$100k – $200k	31.7%	27.2%	28.5%
Over $200k	7.7%	10.7%	14.3%

Under $10k 1.9%

$10k–$15k 1.1%

$15k–$25k 5.0%

$25k–$35k 2.7%

$35k–$50k 8.5%

$50k–$75k 13.3%

$75k–$100k 14.6%

$100k–$150k 20.5%

$150k–$200k 16.4%

$200k+ 16.0%

Range	% of households
Under $10k	1.9%
$10k–$15k	1.1%
$15k–$25k	5.0%
$25k–$35k	2.7%
$35k–$50k	8.5%
$50k–$75k	13.3%
$75k–$100k	14.6%
$100k–$150k	20.5%
$150k–$200k	16.4%
$200k+	16.0%
Median income	$105,639

Housing

Home values

Under $50k 0.9%

$150k–$200k 0.8%

$200k–$300k 3.9%

$300k–$500k 21.1%

$500k–$1M 55.1%

$1M+ 18.2%

Housing overview

Metric	Value
Median home value	$661,100
Median rent / month	$1,514
Owner occupied	82.2%
Renter occupied	17.8%
Vacant	53.1%
Single-family detached	87.6%
Large apartment buildings	0.6%
Mobile homes	0.0%
Median rooms	6.0
Avg household size (owned)	2.18

Year built

Era	%
2020 or later	0.0%
2010–2019	1.9%
2000–2009	5.2%
1990–1999	12.0%
1980–1989	15.2%
1970–1979	31.5%
1960–1969	14.4%
1950–1959	9.0%
1940–1949	3.7%
1939 or earlier	7.1%

Bedrooms

Size	% of units
No bedroom (studio)	1.0%
1 bedroom	4.8%
2 bedrooms	16.9%
3 bedrooms	48.8%
4 bedrooms	18.7%
5+ bedrooms	9.8%

Vehicles per household

Vehicles	% of households
No vehicle	2.4%
1 vehicle	36.3%
2 vehicles	35.3%
3 or more	26.0%

Heating fuel

Fuel type	%
Utility gas	74.2%
Electricity	11.0%
Propane / LP gas	0.3%
Fuel oil	13.8%
Solar	0.6%

Households & families

Household type	Count	%
Married-couple family	647	45.3%
Cohabiting couple	164	11.5%
Male householder, no spouse	229	16.0%
Female householder, no spouse	389	27.2%
Households with children under 18	139	9.7%
Households with seniors (65+)	893	62.5%
Average household size	2.20

Marital status

Status	Male	Female
Never married	27.1%	16.4%
Married	55.6%	51.5%
Separated	0.0%	0.0%
Widowed	5.2%	14.6%
Divorced	12.0%	17.5%

Education

Less than 9th grade 0.0%

Some HS, no diploma 4.0%

HS graduate 31.0%

Some college, no degree 19.6%

Associate's degree 6.3%

Bachelor's degree 19.4%

Graduate / professional 19.7%

Metric	%
HS diploma or higher	96.0%
Bachelor's or higher	39.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	155	52.5%
High school	70	23.7%
College / grad school	70	23.7%

Employment

Industry of employment

Education & healthcare 23.6%

Other services 18.1%

Retail trade 11.7%

Professional & management 11.5%

Finance & real estate 11.2%

Arts, food & hospitality 5.6%

Public administration 5.3%

Wholesale trade 5.1%

Construction 4.3%

Manufacturing 2.6%

Information 0.6%

Transportation & utilities 0.5%

Occupation

Category	%
Management, business & arts	42.8%
Service	26.7%
Sales & office	14.4%
Natural resources & construction	10.5%
Production & transportation	5.7%

Employment type

Type	%
Private sector	73.8%
Government	13.8%
Self-employed	11.7%
Unpaid family workers	0.8%

Commute

Method	%
Drive alone	65.6%
Carpool	0.7%
Public transit	0.0%
Walk	0.7%
Work from home	29.4%
Other means	3.7%
Avg commute (minutes)	27.1

Poverty

All people 5.4%

Under 18 years 15.7%

18 and over 4.6%

Married-couple families 4.2%

Female-led households 14.3%

Income support

Source	% of households
Social Security	58.8%
Retirement income	50.5%
Supplemental Security	1.5%
Cash public assistance	1.6%
Food stamps / SNAP	5.0%

Health indicators

Condition	%
Obesity	24.4%
High blood pressure	37.9%
High cholesterol	38.2%
Diabetes	10.4%
Heart disease	8.7%
Stroke	3.7%
Asthma	10.1%
Arthritis	33.6%
Kidney disease	3.7%
Pulmonary disease	6.9%
Cancer	11.3%

Behavior / access	%
Smoking	10.8%
Binge drinking	13.0%
No physical activity	18.0%
Less than 7 hrs sleep	26.3%
Depression	17.9%
Fair or poor health	11.6%
Poor mental health	11.1%
Poor physical health	9.5%
No health insurance	4.8%
Visited doctor (checkup)	84.4%
Visited dentist	76.7%
Cholesterol screening	95.2%
Teeth loss	8.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	271	9.3%

Disability	%
Any disability	18.2%
Under 18	5.7%
18–64 years	16.5%
65 and over	22.5%

Health insurance coverage

Type	%
Private insurance	75.8%
Public insurance	48.3%
No insurance	7.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,142	99.9%
Spanish	11	0.4%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	11	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,967	94.3%
Born in same state	2,967	94.3%
Born in different state	2,318	73.7%
Foreign born	0	0.0%
Naturalized citizen	179	5.7%
Not a US citizen	122	68.2%

Ancestry

Ancestry	Count	%
Italian	962	30.6%
French	549	17.5%
Norwegian	292	9.3%
Arab	252	8%

Ancestry	Count	%
German	66	2.1%
Irish	9	0.3%
English	9	0.3%
Polish	9	0.3%

Technology access

Metric	% of households
Computer access	45.4%
Internet access	98.9%

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

Frequently asked questions about ZIP code 02638

What city is ZIP code 02638 in?

ZIP code 02638 is primarily assigned to Dennis, Massachusetts.

What county is ZIP code 02638 in?

ZIP code 02638 falls within Barnstable County, Massachusetts.

Does ZIP code 02638 have an older population?

41% of residents in ZIP code 02638 are 65 or older, above the national average of ~17%.

Does ZIP code 02638 have a large retiree population?

59% of households in ZIP code 02638 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 02638 mostly owner-occupied?

82% of occupied units in ZIP code 02638 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 02638?

The median home value in ZIP code 02638 is $661,100.

What timezone is ZIP code 02638 in?

ZIP code 02638 observes the EST timezone.