Community & Data
Demographics
A Portrait of Marshfield
Marshfield holds 25,825 people across 28.6 square miles of land on the South Shore, which works out to about 901 residents per square mile, and the summer population runs far higher than the year-round one. One resident in five is 65 or over and almost exactly the same share is under 18, so the town is carrying a full school system and a busy senior center at the same time. Four in five homes are owner-occupied, households average 2.5 people, and the median household income is $125,525. 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).
Population & Households
- Population (2020 Census): 25,825
- Households: 10,195
- Persons per household: 2.5
- Foreign-born: 2.9% of residents
- Age 65 and over: 20.1%
- Under 18: 19.8%
Race & Ethnicity
- White: 96.0%
- Asian: 0.4%
- Black or African American: 0.6%
- Hispanic or Latino (any race): 2.2%
- Two or more races: 2.3%
- Speak a language other than English at home: 2.7%
Economy & Housing
- Median household income: $125,525
- Poverty rate: 7.6%
- Median home value: $621,300
- Median gross rent: $1,620
- Homeownership: 81.0% of units
- In the labor force: 68.9%
Registered Voters
Massachusetts publishes voter-registration counts by town through the Secretary of the Commonwealth; the counts below are the state’s enrollment snapshot from February 1, 2025. As in most of the state, Marshfield’s largest bloc by far is voters who choose no party at all.
- Total registered: 21,917
- Unenrolled (no party): 15,009 (68.48%)
- Democrats: 4,085 (18.64%)
- Republicans: 2,618 (11.95%)
Sources
See how Marshfield fits into the broader Commonwealth.