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CITY · 2000 CENSUS

South Dennis

Massachusetts · 3,679 residents · 4.55 sq mi
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The short version

With 3,679 people, South Dennis is a city in Massachusetts. At a median age of 45.5, this is an older place than the country as a whole. 80% of homes are owner-occupied. The poverty rate is 3.2%, under the national 12.4%. Households here earn about 20% less than in Massachusetts as a whole. Renters pay $806 a month at the median.

At a glance
Lower income
below the US median
US median: $42,589
Older
median age 45.5
US median: 35.2
Average education
25% hold a bachelor's degree
US average: 24%
More affordable
home values down 25%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

3,679
+3%since 1990
from 3,559 in 1990
1990 – 2024
45.5
+13%since 1990
from 40.4 in 1990
US average: 35.2
Land area
4.55 sq mi
Population, 19902024
3K3K4K4K4K19902000201020202024South Dennis
20243K
1990201020202024
Age distribution, 2000
Under 54.5%(164)
US avg: 6.8%
5 to 95.5%(202)
US avg: 7.3%
10 to 146.9%(255)
US avg: 7.3%
15 to 194.7%(173)
US avg: 7.2%
20 to 242.9%(105)
US avg: 6.7%
25 to 349.6%(355)
US avg: 14.2%
35 to 4415.1%(557)
US avg: 16%
45 to 5414.7%(540)
US avg: 13.4%
55 to 6411.5%(422)
US avg: 8.6%
65 to 7412.6%(462)
US avg: 6.5%
75 to 849.6%(355)
US avg: 4.4%
85 and over2.4%(89)
US avg: 1.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

$40,330
−1%inflation adjusted, since 1990
from $30,938 in 1990
US average: $42,589
1990 – 2024
$22,974
+66%since 1990
from $13,832 in 1990
US average: $21,522
3.2%
−8.0 ptssince 1990
from 11.2% in 1990
US average: 12.4%
Section 03

Housing

$137,900
−25%inflation adjusted, since 1990
from $139,600 in 1990
US average: $120,530
1990 – 2024
$806
−10%inflation adjusted, since 1990
from $679 in 1990
US average: $602
79.7%
+5.9 ptssince 1990
from 73.8% in 1990
20.3% rent
Section 04

Race & ethnicity

1990
White, non-Hispanic98.6%(3,508)
Black0.3%(11)
Hispanic / Latino1.1%(38)
Asian0.8%(29)
2000
White, non-Hispanic94.5%(3,477)
Black1%(37)
Hispanic / Latino1.3%(48)
Asian0.4%(13)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Puerto Rican0.4%(11)
Mexican0.1%(2)
Asian origin
Filipino0.3%(10)
Ancestry
Irish27.5%(862)
English19.9%(625)
Italian10.1%(318)
American6.2%(194)
French5.7%(178)
West Indian4.9%(153)
Polish4.6%(143)
Jamaican4.4%(138)
Swedish2.7%(86)
Scottish2.6%(83)
Portuguese2.1%(66)
+ 11 more ancestry groups with data
German1.8%(56)
Finnish1.1%(34)
Dutch0.6%(20)
Armenian0.6%(19)
Arab0.6%(18)
Lithuanian0.5%(16)
Canadian0.5%(15)
Lebanese0.4%(12)
Norwegian0.3%(8)
Syrian0.2%(6)
Section 05

Education

24.6%
+0.1 ptssince 1990
from 24.5% in 1990
US average: 24.4%
High school or higher
93.3%
+5.0 ptssince 1990
from 88.3% in 1990
US average: 80.3%
8.2%
+2.0 ptssince 1990
from 6.2% in 1990
US average: 8.8%
Section 06

Commute & transportation

13.6 min
−18%since 1990
from 16.6 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status
Men 15+
Never married20.6%(288)
Married64%(893)
Widowed4.5%(63)
Divorced10.9%(152)
Women 15+
Never married19.1%(323)
Married52.6%(891)
Widowed11.8%(200)
Divorced16.6%(281)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

0.9%
−2.5 ptssince 2013
from 3.4% in 2013
US average: 8.4%
64.3%
+7.2 ptssince 2020
from 57.1% in 2020
US average: 54.8%
Direct-purchase
20.5%
−0.9 ptssince 2020
from 21.4% in 2020
US average: 13.8%
36.2%
+3.9 ptssince 2020
from 32.3% in 2020
US average: 18.4%
18.7%
−9.0 ptssince 2020
from 27.7% in 2020
US average: 20.9%
VA health care
2.1%
−0.4 ptssince 2020
from 2.5% in 2020
US average: 2.2%
Any private
78.1%
+9.9 ptssince 2020
from 68.2% in 2020
US average: 67.1%
Any public
48.7%
−6.1 ptssince 2020
from 54.8% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)0%(0)
US avg: 26.4%
Gulf War (1990s)12.1%(18)
US avg: 24.3%
Vietnam era41.6%(62)
US avg: 33.1%
Korean War6%(9)
US avg: 4.5%
World War II0%(0)
US avg: 1%

Share of the 149 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
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Frequently asked

How many people live in South Dennis, Massachusetts?

South Dennis, Massachusetts has about 3,679 residents according to the 2000 Census.

What is the median household income in South Dennis, Massachusetts?

The typical household in South Dennis, Massachusetts earns about $40,330 a year. Half of households make more than that, and half make less.

Is South Dennis, Massachusetts expensive?

In South Dennis, Massachusetts, the median home is worth about $137,900, and the typical rent is about $806 a month.

How educated are people in South Dennis, Massachusetts?

About 24.6% of adults age 25 and over in South Dennis, Massachusetts hold a bachelor's degree or higher.

What is the poverty rate in South Dennis, Massachusetts?

About 3.2% of people in South Dennis, Massachusetts live below the federal poverty line.

Has South Dennis, Massachusetts grown since 1990?

Yes, South Dennis, Massachusetts has grown since 1990. The population has added about 120 residents, a change of about 3 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →