Demographics & People — Seconsett Island, Massachusetts

Population Overview

Population (Census)	138
Estimated 2026	~300
Median Age	50.3
Total Households	65
Family Households	29
Average Household Size	2.12
Diversity Index	N/A (N/A)

Race & Ethnicity

White	138
Black or African American	0
Asian	0
Hispanic or Latino	0

Heritage & Ancestry

Group	Count
Irish	61
German	59
Welsh	23
Unclassified or not reported	19
Swedish	10
French Canadian	10
French (except Basque)	10
Lithuanian	6

Language

English Only	106
Spanish	0
Population 5+	118

Veterans

Veterans	0
Population 18+	92

Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013 (county fallback). Data for Seconsett Island, Massachusetts.