South Dennis, MA demographics:
population, income, and more

Total population
3,135
-1.7% year-over-year change
Median household income
$88,411/yr
2.2% year-over-year change
Housing units
2,616
-0.1% year-over-year change

South Dennis population

How many people live in South Dennis

South Dennis is home to 3,135 residents, according to the most recent Census data. Gender-wise, 52.4% of South Dennis locals are male, and 47.6% are female.

Total population
3,135
-1.7% year-over-year change
Gender ratio
Male
52.4%
1,642
Female
47.6%
1,493
Value Percent YoY change
Male 1,642 52.4% 4.1%
Female 1,493 47.6% -7.4%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in South Dennis is 58, with the population distributed as follows: about 10.1% are children under 15, then 4.6% are in the 15 to 24 age group. Adults between 25 and 44 make up 21.3% of the population, while another 28.2% fall into the 45 to 64 bracket. Finally, around 35.8% are 65 or older.

Median age
57.6
Age breakdown
Under 15
10.1%
15 to 24
4.6%
25 to 44
21.3%
45 to 64
28.2%
Over 65
35.8%
Value Percent YoY change
Under 15 318 10.1% -6.2%
15 to 24 143 4.6% -45.8%
25 to 44 668 21.3% -2.0%
45 to 64 884 28.2% -0.5%
Over 65 1,122 35.8% 10.3%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In South Dennis, 91.4% of the population are US-born citizens, while 7% have gained naturalized citizenship. At the same time, 1.6% of residents are non-citizens. As for race, 91.4% of locals are Caucasian, 4.7% are African American and 0.5% have Asian roots. There’s also a share of 0.4% that includes residents with two or more races.

Citizenship
U.S.-born citizens
91.4%
Non-U.S.-born citizens
7%
Non-citizens
1.6%
Value Percent YoY change
U.S.-born citizens 2,865 91.4% -2.1%
Non-U.S.-born citizens 221 7% 7.3%
Non-citizens 49 1.6% -12.5%
Racial breakdown
White
91.4%
Black or African American
4.7%
American Indian and Alaska Native
0%
Asian
0.5%
Native Hawaiian and other Pacific Islander
0%
Two or more races
0.4%
Other
3%
Value Percent
White 2,864 91.4%
Black or African American 148 4.7%
Asian 17 0.5%
Two or more races 13 0.4%
Other 93 3%

Households in South Dennis

A peek inside South Dennis households

South Dennis has 1,597 households, with an average of 2 members in each. Of these, 57.7% are families, while the remaining 42.3% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
1,597
2.6% year-over-year change
Average people per household
2
Non-family households
676
Family households
921
Value Percent YoY change
Non-family households 676 42.3% 5.1%
Family households 921 57.7% 0.9%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in South Dennis

The housing landscape of South Dennis

South Dennis's housing consists of 2,616 units, with 86.5% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 3.3% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 4.7% of the housing landscape.

Housing units
2,616
-0.1% year-over-year change
Housing types
Value Percent
1 unit, detached 2,263 86.5%
1 unit, attached 87 3.3%
2 units 11 0.4%
3 or 4 units 45 1.7%
5 to 9 units 9 0.3%
10 to 19 units 63 2.4%
50 or more units 14 0.5%
Mobile home 124 4.7%
Homes built since 2020
9
-30.8% year-over-year change

The age of buildings in South Dennis

In South Dennis, the median construction year is 1975. About 2.1% of homes were built before the 1940s, with another 0.3% going up by 1949. Most development happened in the second half of the 20th century. Then, 7% of homes were added from 2000 to 2009, 2.1% between 2010 and 2019, and 0.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 56 2.1% 1.8%
Built between 1940 and 1949 8 0.3% -79.0%
Built between 1950 and 1959 267 10.2% 23.6%
Built between 1960 and 1969 550 21% -10.6%
Built between 1970 and 1979 788 30.1% -4.0%
Built between 1980 and 1989 546 20.9% 14.5%
Built between 1990 and 1999 153 5.8% 3.4%
Built between 2000 and 2009 184 7% 12.2%
Built between 2010 and 2019 55 2.1% -23.6%
Built in 2020 or later 9 0.3% -30.8%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

South Dennis occupancy rates

Out of the 1,597 occupied housing units in South Dennis, 82.7% are owner-occupied, while 17.3% are lived in by tenants. Meanwhile, 39% of all homes on the local market sit vacant.

Occupied housing units
1,597
2.6% year-over-year change
Occupancy breakdown
Renter occupied
276
Owner occupied
1,321
Value Percent YoY
change
Renter occupied 276 17.3% -7.4%
Owner occupied 1,321 82.7% 5.0%
Unoccupied housing units
39.0%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

South Dennis housing costs

Housing costs in South Dennis come to a median of $1,452 per month, while tenants specifically pay a median gross rent of $2,003.

Median housing costs per month
$1,452/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in South Dennis
$2,003/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in South Dennis

South Dennis education at a glance

About 37.2% of the population in South Dennis went to high school, while 13% pursued college studies. Another 8.3% earned an associate degree and 27.6% hold a bachelor’s. Meanwhile, 13.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 9 0.3% 12.5%
High school diploma 1,044 37.2% 3.5%
College diploma 366 13% -33.2%
Associate degree 232 8.3% -23.4%
Bachelor's degree 775 27.6% 24.2%
Graduate degree 382 13.6% 13.3%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in South Dennis

How much people earn in South Dennis

The average annual household income in South Dennis was $99,225 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -0.2% change from the previous year. At the same time, the median income stood at $88,411, reflecting a +2.2% shift over the same period.

Average household income in South Dennis
$99,225/year
-0.2% year-over-year change
Median household income in South Dennis
$88,411/year
2.2% year-over-year change

South Dennis income by age

In South Dennis, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $93,709. Those with someone between 45 and 64 in charge, often well established professionally, earn $89,922 overall. Overall, 97% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $93,709 1.5%
45 - 64 $89,922 -11.1%
Over 65 $75,972 22.4%
Above poverty level
2,950
Below poverty level
92
Value Percent YoY
change
Above poverty level 2,950 97% -0.3%
Below poverty level 92 3% -34.8%

Average renter income in South Dennis

To get a better sense of what renters earn on average in South Dennis, their median household income was $72,206 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 33.3%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$72,206
Rent-to-income ratio
33.3%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in South Dennis

Workforce and job types in South Dennis

The job market in South Dennis is powered by 1,638 working residents, spread across a range of industries and roles. 82.8% of the working population are employed in professional or administrative positions, while 17.2% are in hands-on or service-based jobs. Also, 9.2% run their own businesses, 58.3% are employed by private companies, and 18.4% work in the public sector.

Workforce demographics

Working population
1,638
-2.6% year-over-year change
White collar
1,356
Blue collar
282
Value Percent YoY change
White collar 1,356 82.8% -3.9%
Blue collar 282 17.2% 4.4%
Employer type
Self employees
9.2%
Private companies
58.3%
Governmental workers
18.4%
Not for profit companies
14%
Value Percent YoY change
Self employees 151 9.2% -11.2%
Private companies 955 58.3% -1.8%
Governmental workers 302 18.4% -16.1%
Not for profit companies 230 14% 28.5%
Unemployment rate
3.8%
6.7% year-over-year change

Available workforce

The unemployment rate in South Dennis stands at 3.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in South Dennis

How people get around in South Dennis

In South Dennis, the average commute time is 25 minutes.

Commute time
25 min
7.9% year-over-year change
Means of transportation
Value Percent YoY change
Car 1,473 90.5% -5.6%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

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FAQs about South Dennis demographics 

What is the total population of South Dennis?

South Dennis has a total population of 3,135 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -1.7% compared to a year ago.

What is the gender ratio in South Dennis?

The gender ratio in South Dennis is as follows:
  • 52.4% males (1,642 residents)
  • 47.6% females (1,493 residents)

What is the median age in South Dennis?

The median age in South Dennis is 57.6.

What is the age distribution of the population in South Dennis?

The age distribution in South Dennis is as follows:
  • Under 15: 10.1% (318 residents)
  • Ages 15-24: 4.6% (143 residents)
  • Ages 25-44: 21.3% (668 residents)
  • Ages 45-64: 28.2% (884 residents)
  • Over 65: 35.8% (1,122 residents)

What is the racial and ethnic makeup of South Dennis?

The racial and ethnic makeup of South Dennis is as follows:
  • White: 91.4% (2,864 residents)
  • Black or African American: 4.7% (148 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 0.5% (17 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 0.4% (13 residents)
  • Other: 3% (93 residents)

What percentage of the population in South Dennis are U.S.-born citizens?

U.S.-born citizens represent 91.4% of the population in South Dennis.

How many housing units are there in South Dennis?

There are 2,616 housing units in South Dennis, reflecting a -0.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in South Dennis and what is the average household size?

South Dennis has a total of 1,597 households, with an average of 2 people in each.

What is the median household income in South Dennis?

South Dennis has a median household income of $88,411, representing a +2.2% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for South Dennis?

The employment rate is 96.2% in South Dennis, with a workforce of 1,638 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 82.8% (1,356 residents)
  • Blue-collar workers: 17.2% (282 residents)

Places of employment:
  • Self-employed: 9.2% (151 residents)
  • Private companies: 58.3% (955 residents)
  • Governmental workers: 18.4% (302 residents)
  • Not-for-profit companies: 14% (230 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025