South Dennis CDP, Massachusetts Demographics & Population 2026

Population Overview

South Dennis CDP is a small community located in Massachusetts. The total population is 3,190. It ranks as the 149th most populous out of 248 cities and towns in Massachusetts.

Age Demographics

The median age in South Dennis CDP is 55.2 years. This is 38% higher than the state median of 40.0 years. Only 11.3% of residents are under 18, indicating fewer families with children. 15.4% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in South Dennis CDP is $86,500. This is 15% lower than the state median of $101,341. Compared to the national median of $78,538, household income here is 10% higher. The poverty rate stands at 4.5%. This is 55% lower than the state poverty rate of 10.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 3.5%. This is 33% lower than the state rate of 5.1%. The median home value is $454,400. Housing costs are 14% lower than the state median of $525,800. The home-value-to-income ratio is 5.3x. 80.8% of occupied housing units are owner-occupied. This homeownership rate is 29% higher than the state average of 62.6%.

Race & Ethnicity

South Dennis CDP has a predominantly White (non-Hispanic) population, comprising 91.2% of all residents. Black or African American residents account for 4.0%. The Hispanic or Latino population (0.7%) is well below the state average of 12.9%. The Asian population (0.5%) is well below the state average of 7.0%.

Education

37.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 20% lower than the state rate of 46.6%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.1%.

Data Sources & Methodology

All demographic data for South Dennis CDP, Massachusetts is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Massachusetts state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 248 Census-designated places in Massachusetts. For official data, visit data.census.gov.