Census-designated place · Massachusetts
Dennis CDP, Massachusetts
Dennis CDP, census-designated place, in Barnstable County, Massachusetts. Dennis CDP had 2,399 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 2,424 (±285). GEOID 2516740.
Residents, 2020 Census
2,399
Census count or controlled total
ACS 2020-2024 estimate: 2,424 ±285
Median household income
$109,882
±$12,219 (90% margin)
Massachusetts: $103,960
Median home value
$944,500
±$93,089 (90% margin)
Massachusetts: $562,100
Median gross rent
$1,199
±$299 (90% margin)
Massachusetts: $1,762
Where is Dennis CDP and what county is it in?
Dennis CDP is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Barnstable County, Massachusetts. It covers 4.9 square miles of land, 488 residents per square mile in 2020.
Dennis CDP is in the Barnstable Town, MA metropolitan statistical area (Census Bureau delineation, July 2023).
Dennis CDP lies entirely within Dennis, a town with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Dennis CDP, and is it growing?
The 2020 Census counted 2,399 residents in Dennis CDP, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 2,424 (±285).
The Census Bureau publishes yearly population estimates for incorporated places only; Dennis CDP is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Dennis CDP | Barnstable County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 2,424 ±285 | 231,668 | no clear change |
| Households | 1,139 ±143 | 105,777 | no clear change |
| Average household size | 2.13 ±0.22 | 2.16 | no clear change |
| Housing units | 2,368 ±204 | 166,215 | −270 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Dennis CDP?
The median resident of Dennis CDP is 63.3 years old; 17.9% are under 18 and 46.5% are 65 or older. The largest group is non-Hispanic white residents at 90.8%, then Hispanic or Latino residents (of any race) at 8.5%. 6.5% of residents were born outside the United States.
| Measure | Dennis CDP | Barnstable County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 63.3 ±6.5 | 55.4 | no clear change |
| Under 18 years | 17.9% ±7.7 pts | 14.1% | – |
| 65 years and over | 46.5% ±8.3 pts | 33.1% | – |
| Male | 42.8% ±4.1 pts | 48.1% | – |
| Hispanic or Latino (any race) | 8.5% ±10.0 pts | 3.7% | – |
| White alone, not Hispanic | 90.8% ±9.9 pts | 85.2% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±1.7 pts | 2.8% | – |
| Asian alone, not Hispanic | 0.0% ±1.7 pts | 1.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.7 pts | 0.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 0.7% ±1.1 pts | 5.2% | – |
| Some other race alone, not Hispanic | 0.0% ±1.7 pts | 1.3% | – |
| Born outside the United States | 6.5% ±3.5 pts | 9.9% | – |
| Speak a language other than English at home (age 5+) | 6.0% ±6.0 pts | 10.8% | – |
| Civilian veterans (age 18+) | 12.3% ±5.5 pts | 7.1% | – |
| With a disability | 13.9% ±6.3 pts | 14.8% | – |
| No health insurance coverage | 2.3% ±2.0 pts | 2.7% | – |
| High school graduate or higher (age 25+) | 98.5% ±2.3 pts | 96.2% | – |
| Bachelor's degree or higher (age 25+) | 56.5% ±9.6 pts | 48.2% | no clear change |
| Graduate or professional degree (age 25+) | 29.5% ±7.1 pts | 22.4% | – |
| Lived in the same house a year earlier | 90.3% ±6.0 pts | 90.8% | – |
| Moved from another state in the past year | 2.2% ±3.4 pts | 2.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Dennis CDP earn?
Half of Dennis CDP's 1,139 households earn less than $109,882 a year (±$12,219), against $95,241 in Barnstable County and $103,960 in Massachusetts. In 2015-2019 it was $111,741 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Dennis CDP | Barnstable County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $109,882 ±$12,219 | $95,241 | no clear change |
| Mean household income | $151,001 ±$25,189 | $134,349 | – |
| Per capita income | $70,340 ±$13,692 | $62,086 | no clear change |
| People below the poverty line | 4.3% ±3.3 pts | 7.7% | – |
| Children under 18 below the poverty line | 7.6% ±11.2 pts | 9.1% | – |
| Households receiving SNAP | 6.2% ±4.6 pts | 9.4% | – |
| Households with a computer | 99.0% ±1.4 pts | 96.5% | – |
| Households with a broadband subscription | 97.3% ±1.9 pts | 94.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Dennis CDP?
Owners occupy 85.8% of Dennis CDP's occupied homes and renters 14.2%. The median owner-occupied home is valued at $944,500 by its owner (±$93,089). The median renter pays $1,199 a month including utilities.
| Measure | Dennis CDP | Barnstable County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $944,500 ±$93,089 | $629,000 | +$321,892 |
| Median gross rent | $1,199 ±$299 | $1,678 | no clear change |
| Renters paying 35% or more of income on rent | 28.4% ±27.1 pts | 48.8% | – |
| Median monthly owner costs, with a mortgage | $2,136 ±$413 | $2,432 | – |
| Owner-occupied homes | 85.8% ±7.0 pts | 81.1% | no clear change |
| Renter-occupied homes | 14.2% ±7.0 pts | 18.9% | – |
| Housing units | 2,368 ±204 | 166,215 | −270 |
| Homeowner vacancy rate | 0.0% ±4.3 pts | 1.0% | – |
| Rental vacancy rate | 0.0% ±22.8 pts | 4.7% | – |
| Single-family detached homes | 84.5% ±5.0 pts | 81.6% | – |
| Mobile homes | 1.5% ±2.4 pts | 0.8% | – |
| Built 2020 or later | 0.9% ±1.0 pts | 0.8% | – |
| Built 2010 to 2019 | 4.2% ±3.5 pts | 4.1% | – |
| Built 1939 or earlier | 11.3% ±5.6 pts | 11.4% | – |
| Households with no vehicle | 1.4% ±1.6 pts | 5.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Dennis CDP work and get to work?
63.5% of Dennis CDP's workers drive alone and 31.7% work from home. The average trip to work takes 15.6 minutes.
| Measure | Dennis CDP | Barnstable County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 42.0% ±6.8 pts | 58.3% | – |
| Unemployment rate | 3.2% ±4.2 pts | 5.0% | – |
| Drove alone to work | 63.5% ±13.5 pts | 72.1% | – |
| Carpooled | 2.1% ±2.2 pts | 7.0% | – |
| Public transportation | 1.8% ±3.1 pts | 1.2% | – |
| Walked | 1.0% ±1.3 pts | 1.9% | – |
| Worked from home | 31.7% ±13.9 pts | 16.0% | +21.7 pts |
| Mean travel time to work | 15.6 min ±2.4 | 24.8 min | −17.1 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Dennis CDP?
1 census tract lies mostly in Dennis CDP, and 1 more reaches into it (2020 census blocks).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Dennis CDP) · Census block assignment files
How does Dennis CDP compare with other places in Massachusetts?
Dennis CDP ranks 228th of 453 places in Massachusetts with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 367th | 460 |
| Residents per square mile | 318th | 461 |
| Median household income | 228th | 453 |
| Per capita income | 112th | 460 |
| Median home value | 35th | 459 |
| Median gross rent | 314th | 410 |
| Bachelor's degree or higher | 139th | 459 |
| Median age | 12th | 461 |
| Owner-occupied share | 131st | 460 |
| Work from home | 41st | 429 |
| Travel time to work | 452nd | 459 |
Dennis CDP's figures with every place in Massachusetts (CSV)
Every place in Massachusetts, sortable · Compare Dennis CDP with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Dennis CDP?
24 of the 57 figures for Dennis CDP on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Dennis CDP are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.