United States › Massachusetts › South Dennis CITY · 2020 ACS
South Dennis Massachusetts · 3,899 residents · 4.55 sq mi
Time machine
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The short version
With 3,899 people, South Dennis is a city in Massachusetts. At a median age of 55.6, this is an older place than the country as a whole. 80% of homes are owner-occupied. Households here earn about 27% less than in Massachusetts as a whole. The foreign-born share is 5%. The poverty rate is 7.8%, under the national 12.8%.
At a glance
Lower income
below the US median
US median: $66,278
Older
median age 55.6
US median: 38.8
Average education
31% hold a bachelor's degree
US average: 33%
Less affordable
home values up 56%, inflation adjusted
US median home: $265,253
Section 01
Population & growth from 45.5 in 2000
US average: 38.8
Population, 1990 – 2024
3K 3K 4K 4K 4K 1990 2000 2010 2020 2024 South Dennis Age distribution, 2020
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Section 02
Income & economy $61,971
+2%inflation adjusted, since 2000
from $40,330 in 2000
US average: $66,278
from $22,974 in 2000
US average: $35,364
Households earning $100K+
from 33.1% in 2009
US average: 43.9%
from 3.2% in 2000
US average: 12.8%
Workforce by industry, 2020
Public administration 5.7%
Transportation & warehousing 5.3%
Professional, scientific, technical 3.7%
Education & health services 2.3%
Arts, entertainment, food 2.1%
Agriculture, forestry, fishing 0%
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$323,300
+56%inflation adjusted, since 2000
from $137,900 in 2000
US average: $265,253
$1,377
+14%inflation adjusted, since 2000
from $806 in 2000
US average: $1,124
from 79.7% in 2000
20.5% rent
from 2.24 people in 2009
US average: 2.61
from 5.6 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Section 04
Race & ethnicity 2000
White, non-Hispanic 94.5%(3,477)
Hispanic / Latino 1.3%(48)
2020
White, non-Hispanic 86.4%(3,367)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 16 more ancestry groups with data from 24.6% in 2000
US average: 32.9%
High school or higher
from 93.3% in 2000
US average: 88.5%
from 8.2% in 2000
US average: 12.7%
Section 06
Commute & transportation from 13.6 min in 2000
US average: 26.9
from 88.3% in 2009
US average: 75.1%
from 3.7% in 2009
US average: 8.4%
Section 07
Work & employment from 6.2% in 2011
US average: 5.4%
from 61.6% in 2011
US average: 63.4%
Women 20-64 in the labor force
US average: 73.3%
from 31.1% in 2009
US average: 39.3%
Section 08
People & community from 4.0% in 2009
US average: 13.5%
from 3.4% in 2013
US average: 8.8%
Computer in household
US average: 91.9%
Marital status (2024)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 3.4% in 2013
US average: 8.8%
Direct-purchase
US average: 13.7%
VA health care
US average: 2.3%
Any private
US average: 68.1%
Any public
US average: 35.2%
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, 2020
Gulf War (2001 or later) 6.5%(12)
Share of the 186 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.
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Drill deeper
Places similar to South Dennis Head to head
Compare South Dennis to nearby cities SOUTH DENNIS VS
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Population 11,552 +268%
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SOUTH DENNIS VS
Barnstable
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Home value $602,500 +86%
Population 50,101 +1498%
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SOUTH DENNIS VS
Nantucket
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SOUTH DENNIS VS
New Bedford
Income $56,981 −8%
Home value $357,300 +11%
Population 101,834 +3148%
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Frequently asked
How many people live in South Dennis, Massachusetts? South Dennis, Massachusetts has about 3,899 residents according to the 2020 American Community Survey.
What is the median household income in South Dennis, Massachusetts? The typical household in South Dennis, Massachusetts earns about $61,971 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 $323,300, and the typical rent is about $1,377 a month.
How educated are people in South Dennis, Massachusetts? About 30.8% 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 7.8% 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 340 residents, a change of about 10 percent over that period.
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