Population 3,462 · Census ACS 2020–24
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Population and households in South Dennis
Household size in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 2.08 | 2.53 | 2.68 |
| 2010–14 | 2.07 | 2.57 | 2.73 |
| 2015–19 | 2.10 | 2.57 | 2.71 |
| 2020–24 | 2.02 | 2.52 | 2.65 |
| Change | −0.06 | −0.01 | −0.03 |
Households in South Dennis are small: just 2.02 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 45.6 | 39.4 | 37.7 |
| 2010–14 | 51.4 | 40.1 | 38.6 |
| 2015–19 | 54.0 | 41.0 | 39.6 |
| 2020–24 | 57.0 | 41.4 | 40.1 |
| Change | +11.4 | +2.0 | +2.3 |
South Dennis skews older: half of its residents are older than 57.0, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. The median age has climbed from 45.6 in 2006–10, but in a place this small, survey estimates can swing a lot from one release to the next.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 12.5% | 11.0% | 12.3% |
| 2010–14 | 12.2% | 11.0% | 12.3% |
| 2015–19 | 10.9% | 10.3% | 11.6% |
| 2020–24 | 8.3% | 10.6% | 11.6% |
| Change | −4.1 pts | −0.4 pts | −0.6 pts |
Single-parent households are relatively rare in South Dennis: 8.3% of households, against 11.6% nationally.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in South Dennis
Renters in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 24.7% | 36.0% | 33.3% |
| 2010–14 | 22.3% | 37.7% | 35.6% |
| 2015–19 | 25.5% | 37.6% | 36.0% |
| 2020–24 | 18.6% | 37.5% | 34.8% |
| Change | −6.2 pts | +1.5 pts | +1.5 pts |
Only 18.6% of households in South Dennis rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 44.9% have no mortgage at all, above the national share of 39.8%.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 34.1% | 9.5% | 11.4% |
| 2010–14 | 35.2% | 9.1% | 11.4% |
| 2015–19 | 42.1% | 8.9% | 11.1% |
| 2020–24 | 41.5% | 7.9% | 9.6% |
| Change | +7.4 pts | −1.6 pts | −1.8 pts |
Vacancy is high in South Dennis: 41.5% of homes are empty, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 1973 | 1958 | 1974 |
| 2010–14 | 1973 | 1959 | 1975 |
| 2015–19 | 1971 | 1961 | 1977 |
| 2020–24 | 1973 | 1963 | 1980 |
| Change | −0 | +5 | +6 |
Housing in South Dennis leans older: the median home dates to 1973, against 1980 nationally. Even so, homes here are newer than in Massachusetts as a whole, where the median home dates to 1963.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | $1,024 | $1,085 | $965 |
| 2010–14 | $1,087 | $1,157 | $1,040 |
| 2015–19 | $1,247 | $1,398 | $1,213 |
| 2020–24 | $1,773 | $1,860 | $1,571 |
| Change | +$748 | +$775 | +$606 |
The median renter in South Dennis pays $1,773 a month for rent and utilities, above the national median of $1,571. That is in line with the rest of Massachusetts. Rent takes 33.1% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in South Dennis
Bachelor's degrees in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 32.4% | 38.5% | 28.4% |
| 2010–14 | 29.4% | 40.1% | 29.6% |
| 2015–19 | 32.9% | 43.6% | 32.1% |
| 2020–24 | 41.9% | 47.2% | 35.6% |
| Change | +9.5 pts | +8.7 pts | +7.2 pts |
College degrees are a bit more common in South Dennis than nationally: 41.9% of adults 25 and older have a bachelor's or higher, against 35.6%. Still, the share is lower than in Massachusetts as a whole (47.2%).
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 91.7% | 88.4% | 84.9% |
| 2010–14 | 92.8% | 89.3% | 86.1% |
| 2015–19 | 95.0% | 90.5% | 87.7% |
| 2020–24 | 97.2% | 91.0% | 89.3% |
| Change | +5.5 pts | +2.6 pts | +4.3 pts |
Finishing high school is nearly universal in South Dennis: 97.2% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in South Dennis
| Period | South Dennis | Massachusetts | U.S. |
|---|---|---|---|
| 2006–10 | 4.5% | 7.5% | 8.1% |
| 2010–14 | 8.3% | 8.7% | 9.4% |
| 2015–19 | 4.9% | 5.0% | 5.6% |
| 2020–24 | 2.1% | 5.2% | 5.4% |
| Change | −2.3 pts | −2.3 pts | −2.7 pts |
Unemployment in South Dennis has been low: just 2.1% of the labor force was out of work and looking, well below the national rate of 5.4%. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
South Dennis compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| South Dennis | 2.02 | 57.0 | 8.3% | 18.6% | 41.5% | 1973 | $1,773 | 41.9% | 97.2% | 2.1% |
| East Dennis | 2.03 | 65.6 | 6.2% | 15.1% | 39.6% | 1975 | $875 | 55.8% | 99.1% | 3.6% |
| Dennis | 2.27 | 60.3 | 1.7% | 12.5% | 45.8% | 1976 | $1,165 | 49.0% | 98.6% | 2.2% |
| West Dennis | 2.04 | 61.1 | 7.7% | 27.4% | 49.4% | 1965 | $1,760 | 42.9% | 95.0% | 1.0% |
| South Yarmouth | 2.07 | 55.9 | 8.2% | 21.8% | 31.3% | 1970 | $1,783 | 38.5% | 95.1% | 7.6% |
| Dennis Port | 1.92 | 53.9 | 5.4% | 29.4% | 49.8% | 1966 | $1,439 | 41.8% | 97.1% | 10.0% |
| Northwest Harwich | 2.34 | 55.7 | 9.4% | 8.0% | 28.0% | 1980 | $2,926 | 47.1% | 97.7% | 7.4% |
| Yarmouth Port | 2.16 | 57.7 | 6.7% | 8.2% | 18.3% | 1980 | $1,993 | 53.8% | 97.0% | 3.2% |
| Harwich | 1.94 | 56.9 | 4.5% | 26.2% | 27.6% | 1975 | $1,814 | 51.3% | 97.7% | 3.7% |
| Harwich Port | 2.07 | 58.2 | 6.9% | 21.1% | 53.1% | 1958 | $1,753 | 61.2% | 98.7% | 9.6% |
| West Yarmouth | 2.14 | 52.6 | 9.2% | 20.7% | 29.5% | 1974 | $1,541 | 33.4% | 92.7% | 5.5% |
All figures 2020–24.
Cities with similar populations: Eufaula, OK · Lansford, PA · Lake Mathews, CA · Juno Beach, FL · Mertztown, PA · Hesston, KS · Greenwood, LA · El Lago, TX · Dresden, OH · Decatur, MS
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up South Dennis. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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