Dennis, MA Profile: Facts & Data


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Dennis, Massachusetts - Basic Facts

The Dennis Census Designated Place had a population of 2,607 as of July 1, 2020. Dennis ranks in the lower quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Massachusetts. See peer rankings below.

The primary coordinate point for Dennis is located at latitude 41.7354 and longitude -70.1939 in Barnstable County. The formal boundaries for the Dennis Census Designated Place encompass a land area of 4.88 sq. miles and a water area of 0.21 sq. miles. Barnstable County is in the Eastern time zone (GMT -5). The elevation is 20 feet.

The Dennis Census Designated Place (GNIS ID: 2378005) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Dennis Census Designated Place is located within Town of Dennis, a minor civil division (MCD) of Barnstable County.

Alternate Unofficial Names for Dennis: Nobsquassitt, Sawkattuckett.


Dennis, MA Data & Demographics (As of July 1, 2020)


Total Population 2,607 (100%)
Population in Households 2,607 (100.0%)
Population in Families 1,968 (75.5%)
Population in Group Quarters1 0
Population Density 531
Diversity Index2 13


Median Household Income $77,010
Average Household Income $118,927
% of Income for Mortgage4 35%
Per Capita Income $58,931
Wealth Index5 228


Total HU (Housing Units) 2,798 (100%)
Owner Occupied HU 1,121 (40.1%)
Renter Occupied HU 175 ( 6.3%)
Vacant Housing Units 1,503 (53.7%)
Median Home Value $645,833
Average Home Value $738,782
Housing Affordability Index3 73


Total Households 1,295
Average Household Size 2.01
Family Households 783
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population 0.78% 0.3%
Households 0.75% 0.26%
Families 0.63% 0.23%
Median Household Income   1.14%
Per Capita Income   2.11%
Owner Occupied HU   0.32%


Dennis, MA - Peer Comparisons by Rank and Percentile

The table below compares Dennis to the other 245 incorporated cities, towns and CDPs in Massachusetts by rank and percentile using July 1, 2020 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 172 30th
Population Density # 224 9th
Median Household Income # 125 49th
Housing Affordability Index # 23 9th
Per Capita Income # 44 82nd
Diversity Index # 214 13th

Additional comparisons and rankings can be made with a VERY EASY TO USE Massachusetts Census Data Comparison Tool.

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