Dennis is a town in Barnstable County, Massachusetts, home to about 14,868 people across 21 square miles. Its ZIP codes are 02638, 02639, 02641, 02660 and 02670.
Homes sold for a median of $576 per square foot across 5 ZIP codes in the three months ending August 2026, and 4 of 5 were seller’s markets.
All in Dennis
All in Dennis
Each card is that ZIP code’s whole market, including any part outside Dennis. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Dennis’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Boston Logan International Airport (BOS)63 miles away |
|---|---|
| Closer regional airport | Cape Cod Gateway Airport (HYA)7 miles away |
| Nearest city of 250,000+ | Boston, MA61 miles away |
| Nearest city of 1 million+ | New York, NY209 miles away |
Straight-line distances from the center of Dennis; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Dennis had 14,674 residents in the 2020 census, down 8% since 2000.
It’s the 139th largest of 351 towns in Massachusetts by population.
Barnstable County grew from 27,826 residents in 1900 to 228,996 in 2020.
Barnstable County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 78°F in summer, and winter lows average 24°F. About 46.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, W Harwich, MA weather station (4 miles away).
76,963 jobs at 8,957 businesses in Barnstable County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
82 doctors and other health care providers list an office in Dennis’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 4 |
|---|---|
| Specialist doctors | 3 |
| Dentists | 9 |
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 28 |
| Physical and occupational therapists | 24 |
| Optometrists | 4 |
| Chiropractors | 5 |
| Pharmacies | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (10 nearby)
Grocery stores (1 nearby)
Pharmacies (1 nearby)
Libraries (7 nearby)
Museums (2 nearby)
Theaters and performance venues (1 nearby)
Counts are within about 3 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1639.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Dennis-Yarmouth. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Ezra H Baker Innovation SchoolWest Dennis | Pre-K–3 | 385 | Public | 2.8 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.