Seconsett Island, Massachusetts Demographics & Population 2026

A note before these figures: with a population of 168, Seconsett Island's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Seconsett Island is a small community located in Massachusetts, within Barnstable County. The total population is 168. It ranks as the 245th most populous out of 248 Census-designated places in Massachusetts.

Age Demographics

The median age in Seconsett Island is 50.3 years. This is 26% higher than the state median of 40.0 years. With 32.1% of the population under 18, Seconsett Island has a notably young demographic profile, suggesting a family-oriented community. 28.6% 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 Seconsett Island is $82,875. This is 20% lower than the state median of $103,960. It is also 3% higher than the national median of $80,734. The ACS records no residents below the poverty line in Seconsett Island. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The unemployment rate is 14.8%. This is 188% higher than the state rate of 5.1%. The median home value is $1,152,300. Housing costs are 105% higher than the state median of $562,100. The home-value-to-income ratio of 13.9x suggests that housing affordability is a significant concern for many residents. 83.1% of occupied housing units are owner-occupied. This homeownership rate is 33% higher than the state average of 62.5%.

Race & Ethnicity

Every resident counted in Seconsett Island was recorded as White (non-Hispanic). A figure of exactly 100.0% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.

Education

57.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 22% higher than the state rate of 47.3%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample. Notably, 34.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Seconsett Island, Massachusetts is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. 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. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.