Community & Data
Plainville Demographics
A Portrait of Plainville
Plainville covers about 11 square miles in the far southwest corner of Norfolk County, a small town of roughly ten thousand people. About two in three of its homes are owner-occupied, households average 2.4 people, and about one resident in eight was born outside the United States. 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): 9,945
- Households: 4,196
- Persons per household: 2.4
- Foreign-born: 7.5% of residents
- Age 65 and over: 22.2%
- Under 18: 18.3%
Race & Ethnicity
- White: 84.7%
- Asian: 1.9%
- Black or African American: 3.1%
- Hispanic or Latino (any race): 6.7%
- Two or more races: 6.0%
- Speak a language other than English at home: 9.1%
Economy & Housing
- Median household income: $104,106
- Poverty rate: 7.4%
- Median home value: $476,000
- Median gross rent: $1,977
- Homeownership: 70.4% of units
- In the labor force: 65.6%
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 August 22, 2026. As in most of the state, Plainville’s largest bloc by far is voters who choose no party at all.
- Total registered: 7,805
- Unenrolled (no party): 5,684 (72.83%)
- Democrats: 1,165 (14.93%)
- Republicans: 885 (11.34%)
- Political designations: 71 (0.91%)
Sources
- U.S. Census Bureau, Plainville
- MA Secretary of the Commonwealth, Voter Registration
- MA DESE, Plainville
- Secretary of the Commonwealth, Massachusetts Elections Calendar: August 22, 2026 was the last day to register to vote and change party enrollment for the September 1, 2026 state primary (G. L. c. 51, sections 26 and 28), which is the date this enrollment count is as of.
See how Plainville fits into the broader Commonwealth.