Siasconset, Massachusetts Demographics & Population 2026

A note before these figures: with a population of 204, Siasconset'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

Siasconset is a small community located in Massachusetts, within Nantucket County. The total population is 204. It ranks as the 244th most populous out of 248 Census-designated places in Massachusetts.

Age Demographics

The median age in Siasconset is 76.0 years. This is 90% higher than the state median of 40.0 years. 50.5% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The poverty rate stands at 37.4%. This is 273% higher than the state poverty rate of 10.0%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in Siasconset, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $1,652,200. Housing costs are 194% higher than the state median of $562,100. 93.6% of occupied housing units are owner-occupied. This homeownership rate is 50% higher than the state average of 62.5%.

Race & Ethnicity

Siasconset has a predominantly White (non-Hispanic) population, comprising 97.1% of all residents. Asian residents account for 1.0%. The Black or African American population (0.5%) is well below the state average of 6.4%. The Asian population (1.0%) is well below the state average of 7.2%.

Education

65.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 39% 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, 29.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Siasconset, 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.