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Dennis

MassachusettsCDP

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Dennis

Total population

2,424

Median home value

$944,500

56.5%

Bachelor's+

Median income

$109,882

Dennis$110k
National$74k

Founded

1639

Air quality index

40Good
Elevation7 m
Land area57.7 km²
Weather60°F · Chance Showers And Thunderstorms
Coordinates41.73°, -70.20°

Demographic figures from US Census Bureau · ACS 5-year estimates. Overview below cites Wikipedia and may reference a different year.

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Active weather alerts
  • Rip Current Statement · Moderate
    Rip Current Statement issued September 21 at 2:15PM EDT until September 22 at 8:00PM EDT by NWS Boston/Norton MA

Source: NOAA National Weather Service.

City facts

Founded
1639
Elevation
7 m
Area
57.7 km²
Official website
www.town.dennis.ma.us

Facts from Wikidata (CC0).

Overview

Dennis is a town on Cape Cod in Massachusetts. It is a seaside resort town with colonial mansions along the northern Cape Cod Bay coastline and beaches along the southern Nantucket Sound. As of the 2020 census, its population was 14,674.

Read more on Wikipedia

History & geography

History

Indigenous peoples have been living in the Cape Cod region for at least 9,000 years. The historic Algonquian-speaking Wampanoag are one of 69 tribes of the original Wampanoag Nation. After being settled by English colonists of the New Plymouth Colony in 1639 as part of the town of Yarmouth, Dennis became known as the East Precinct. The Cape Playhouse in northern Dennis, established in 1927, is the oldest summer theater in the United States. Notable past and present Dennis residents include author Mary Higgins Clark, actress Bette Davis, and actress Amy Jo Johnson.

Geography

The town of Dennis spans the width of Cape Cod, with Cape Cod Bay to the north, Brewster to the northeast, Harwich to the southeast, Nantucket Sound to the south, and Yarmouth to the west. The town is about east of Barnstable, east of the Sagamore Bridge, and southeast of Boston. According to the United States Census Bureau, the town has a total area of , of which is land, and , or 7.88%, is water. Kelly's Pond was probably named after David and Elihu Kelly, who lived nearby in the early 1800s. The area between Kelly's Pond and the Bass River is known as Wrinkle Point. Wrinkle is another word for periwinkle. Uncle Barney's Road, which runs up Wrinkle Point parallel to the Bass River, was named after Barnabas Baker, who had a salt works in the area in the 1800s. The area between Weir Creek and Swan River was once known as Battletown and Lower County Road was called Battle town Road. It was said by a late 1800s resident of the road, Anthony Gage, that "Men used to raise sons to sender down her to fight." South Village was a fishing hamlet in West Dennis during its early days. The name is memorialized by South Village Road, Lane, Circle, Drive, and Beach. At one end of South Village Road is Trotting Park Road, which took its name from the popular race track that was off the street in the late 1800s. At the northern end of the road is a house named Jericho. It was built by Captain Theophilus Baker in 1801 and was purchased in the 20th century by Virginia Gildersleeve and Elizabeth Reynard. They gave the house its present name because its walls were about to come "tumbling down". Repairs were made and the house was given to the town in 1962.

Read full article on Wikipedia

Excerpted from the corresponding Wikipedia article (CC BY-SA).

Demographics & economy

Median age
63.3
Median home value
$944,500
Housing units
2,368
Poverty rate
4.3%
Unemployment
3.2%

Race & ethnicity

White
90.8%
Black
0%
Asian
0%
Hispanic
8.5%

Source: US Census Bureau — American Community Survey, 5-year estimates.

Geography

Latitude
41.7302
Longitude
-70.1974
Water area
0.21 mi²
View on OpenStreetMap

Coordinates & boundaries from the US Census TIGER/Line shapefiles.

Climate

Current forecast

Overnight
60°F
Chance Showers And Thunderstorms
Wednesday
72°F
Patchy Fog then Mostly Sunny
Wednesday Night
52°F
Mostly Clear
Thursday
58°F
Sunny
Thursday Night
48°F
Partly Cloudy
Friday
67°F
Rain Showers

Forecast for Dennis, MA from NOAA NWS API.

Air quality

US AQI — Good
40
PM2.5 (µg/m³)
5
PM10 (µg/m³)
7.7
Ozone (µg/m³)
86
NO₂ (µg/m³)
0.8

Current readings from Open-Meteo Air Quality API (Copernicus CAMS European reanalysis).

Industrial & pollution facilities

Natural hazard risk

Health (adults)

High blood pressure
25.9%
Diabetes
6.3%
Adult obesity
25.4%
Binge drinking
20%
Adult smoking
10.4%
No leisure activity
14.7%

Age-adjusted prevalence estimates from CDC PLACES (latest release).

Walkability

Amenities nearby

Wildlife & biodiversity

Observations (last 5 yrs, 10 mi)
1,198,276
Distinct species (top 10)
10

Most-observed species

  • Song Sparrow
    Melospiza melodia (A.Wilson, 1810) · Aves
    41,015
  • American Crow
    Corvus brachyrhynchos C.L.Brehm, 1822 · Aves
    36,880
  • Black-capped Chickadee
    Poecile atricapillus (Linnaeus, 1766) · Aves
    35,418
  • American herring gull, Smithsonian Gull
    Larus smithsonianus Coues, 1862 · Aves
    35,196
  • Blue Jay
    Cyanocitta cristata (Linnaeus, 1758) · Aves
    34,228
  • Northern Cardinal
    Cardinalis cardinalis (Linnaeus, 1758) · Aves
    32,319
  • American Robin
    Turdus migratorius Linnaeus, 1766 · Aves
    28,939
  • American Goldfinch
    Spinus tristis (Linnaeus, 1758) · Aves
    28,132

Citizen-science & research observations from the Global Biodiversity Information Facility (GBIF).

Schools

Total
20
Elementary
10
Middle
4
High
5
Other
1

Largest nearby schools

  • Barnstable High
    High · Hyannis · 1,763 students · 11.5:1 ratio
  • Dennis-Yarmouth Regional High
    High · South Yarmouth · 888 students · 11:1 ratio
  • Sturgis Charter Public School
    High · Hyannis · 830 students · 9.4:1 ratio
  • Monomoy Regional High School
    High · Harwich · 702 students · 11.7:1 ratio
  • Cape Cod Region Vocational Technical
    High · Harwich · 666 students · 10.6:1 ratio
  • Barnstable Intermediate School
    Middle · Hyannis · 651 students · 11.8:1 ratio
  • Harwich Elementary School
    Elementary · Harwich · 477 students · 10.8:1 ratio
  • Dennis-Yarmouth Middle School
    Middle · South Yarmouth · 476 students · 10.3:1 ratio

Public K–12 schools within ~10 mi from Urban Institute Education Data Portal (NCES Common Core of Data, 2022).

Earthquake history

Quakes ≥ 2.5 (25 yrs, 62 mi)
3
Largest magnitude
3.6
Largest event
2020-11-08

Most recent

Events from the USGS Earthquake Catalog (global) (FDSN Event Web Service).

Photos

Sights & places nearby

Notable people from here

People born within ~10 km, from Wikidata (CC0). Click any name for their Wikipedia article.

Nearby places in Massachusetts

Browse all places in Massachusetts →

Geography & sun

Avg solar (kWh/m²/day)
3.91
Annual solar (kWh/m²)
1,429

Elevation, sunrise/sunset and daylight from Open-Meteo. Solar climatology from NASA POWER.

Nearby airports

Public attention

Wikipedia views (last 30 days)
924
Avg daily Wikipedia views
31
Attention level
Quiet

Pageview totals from the Wikimedia Pageviews API.

Books about Dennis

Search results from Open Library.

Recent natural events nearby

Ground air-quality sensors

Recently spotted species

Nearest stream gauge

Site
HERRING RIVER AT NORTH HARWICH, MA
Distance
5.1 mi
Streamflow
1.9 cfs
Gage height
1.87 ft

Live readings from USGS NWIS · measured 2026-10-13 23:45 UTC.

Events

Sources

  • • Wikipedia
  • • US Census Bureau (ACS 5-year estimates)
  • • NOAA National Weather Service
  • • Wikidata
  • • Open-Meteo Air Quality (CAMS)
  • • USGS Earthquake Catalog (global feed)
  • • USGS NWIS (water data)
  • • NCES via Urban Institute Education Data Portal
  • • GBIF (Global Biodiversity Information Facility)
  • • CDC PLACES
  • • Open-Meteo / sunrise-sunset.org
  • • Wikipedia Pageviews API
  • • Open Library