Welcome to Dennis ...
Dennis is located on Cape Cod Bay.
Dennis is located in Barnstable County<1>.
The location of Dennis has been provided by the Geographic Names Information System (ie- the GNIS).<2>
Dennis was settled in 1639 and was incorporated in 1793.
From the Census Estimates for 2019, Dennis has a population of 13,872 people<3> (see below for details).
Dennis is near sea level<4>.
Time Zone: Dennis lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time
Telephone area codes for Dennis: (508) and (774)<5>
The ZIP code for Dennis: 02638<6>
Websites for Dennis ...
Official Website: www.town.dennis.ma.us/
Population Details ...
Taken from the 2019 Census Estimates, Dennis had an population of 13,872 people. This is a decrease of 2.36% since the 2010 Census (or a decrease of 13.15% since the 2000 Census).
At the time of the 2010 Census, Dennis had a population of 14,207 people (which is 6.58% of the total population of Barnstable County). This makes Dennis the county's 7th most populous community.
The population of Dennis represents 0.22% of the total population of Massachusetts (which has 6,547,629 people), making it the state's 135th most populous community.
With a 2010 count of 14,207 people, the population of Dennis decreased 11.06% from the 2000 Census (with a count of 15,973 people).
More information can be found on the Census Page for Dennis.
Communities Also Named Dennis ...
Using our Gazetteer, we found that there are 24 communities that are also named Dennis - they are located in Georgia (2), Iowa, Kansas, Kentucky (2), Maryland, Michigan (3), Mississippi, Montana, New Brunswick, New Jersey, North Carolina (2), Ohio, Oklahoma, Oregon, South Dakota (2), Texas, Utah and West Virginia.
For more information, see our Tidbits & Trivia Page for Dennis.
Communities near Dennis ...
We have created a list of 10 communities that are near Dennis.
- Barnstable Town
(9 miles [14.5 km] to the west)- Note: The GPS coordinates that we are using for Barnstable Town have been provided by the GNIS.<2> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Barnstable Town
- Barnstable Town is located in Barnstable County
- Population from the 2020 Census: 44,535 people
- Sandwich
(15 miles [24.1 km] to the west) - Mashpee
(15 miles [24.1 km] to the west) - Harwich
(6 miles [9.7 km] to the southeast) - Chatham
(12 miles [19.3 km] to the east) - Orleans
(11 miles [17.7 km] to the east) - Eastham
(13 miles [20.9 km] to the northeast) - Wellfleet
(16 miles [25.7 km] to the northeast) - Truro
(19 miles [30.6 km] to the north) - Cummaquid ‑ Historic
(4 miles [6.4 km] to the southwest)
To Help With Your Genealogy Research ...
We have a couple of sections for those tracing their genealogy.
We created a list of cemeteries that are in the area around Dennis. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Dennis.
Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Dennis. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Dennis.
We also have a detailed list of newspapers that have been published in the area around Dennis. See our Newspapers Page for Dennis.
Adding Dennis to Our Gazetteer ...
We originally found mention of Dennis in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.
From our notes, the earliest published mention we've found for Dennis was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<8>
From that list, the Dennis post office opened in 1798.
We also found Dennis in the book titled U.S. Post Offices (1803).
For more details, see References and Mentions for Dennis.
Off-the-Road Links ...
The official website for Dennis: www.town.dennis.ma.us/
The official website for Barnstable County: www.barnstablecounty.org/
The official website for State of Massachusetts: https://www.mass.gov/
Footnotes ...
| <1> | If you're interested in how the shape of Massachusetts' counties, including Barnstable, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <2> | The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required. |
| <3> | Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Dennis. |
| <4> | The elevation is an estimate for the area around Dennis - it will be higher in some places and lower in others. |
| <5> | Area code (774) is an overlay for area code (508). |
| <6> | ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a community (such as Dennis). When looking for a ZIP Code, whether Dennis or elsewhere, it's always best to check the website of the United States Postal Service (USPS). |
| <7> | If we found a location and have questions about the accuracy of our information, we will simply say that the marker is 'in the vicinity'. We are not confident about the location and the position of our marker is only a rough guide. If we have too many doubts about the location, we will not include it in our database. |
| <8> | A copy of their list with background information can be found at: https://cblevins.github.io/us-post-offices/data-biography/ |