Community & Data
Cohasset Demographics
A Portrait of Cohasset
Cohasset covers about ten square miles of Norfolk County on the Atlantic shore, roughly 857 people to the square mile, and the numbers describe a town that is wealthier and more owner-occupied than the Commonwealth as a whole. About one resident in four is under 18. More than eight homes in ten are lived in by their owners. The median household income is over $199,000 and the poverty rate is 3.0 percent. About one household in twenty speaks a language other than English at home. Figures below are from the U.S. Census Bureau and the Secretary of the Commonwealth. Follow the source links for the latest.
Key Figures
Sources: US Census Bureau (data.census.gov), American Community Survey 5-year estimates 2020-2024.
Population & Households
- Population (2020 Census): 8,381
- Households: 3,037
- Persons per household: 2.8
- Foreign-born: 4.5% of residents
- Age 65 and over: 17.8%
- Under 18: 27.2%
Race & Ethnicity
- White: 93.8%
- Asian: 0.2%
- Black or African American: 0.7%
- Hispanic or Latino (any race): 4.1%
- Two or more races: 4.9%
- Speak a language other than English at home: 4.5%
Economy & Housing
- Median household income: $199,306
- Poverty rate: 3.0%
- Median home value: $1,318,900
- Median gross rent: $2,755
- Homeownership: 83.0% of units
- In the labor force: 65.8%
Registered Voters
Massachusetts publishes voter-registration counts by town through the Secretary of the Commonwealth. As in most of the state, Cohasset’s largest bloc by far is voters who choose no party at all, which is worth knowing before anyone tells you how this town votes.
- Total registered: 6,455
- Unenrolled (no party): 4,341 (67.25%)
- Democrats: 1,250 (19.36%)
- Republicans: 829 (12.84%)
- Political designations: 35 (0.54%)
See how Cohasset fits into the broader Commonwealth.
MassCivics last checked this page on October 14, 2026.
Sources
- Population and demographics: US Census Bureau, Census profile of Cohasset town, Norfolk County (American Community Survey 5-year estimates 2020-2024 and the 2020 Census), as of April 1, 2020 and December 31, 2024.
- Schools and districts: Massachusetts DESE, Enrollment Data (2025-26), Cohasset (00650000).
- Elections and voter enrollment: Secretary of the Commonwealth (spreadsheet), 2026 state primary registration workbook, as of August 22, 2026.
- Elections and voter enrollment: Secretary of the Commonwealth, Massachusetts Elections Calendar.