Community & Data
Demographics
A Portrait of Holliston
Holliston covers 18.655 square miles of Middlesex County, about 804 people to the square mile, and the numbers describe a town that is younger, wealthier and more owner-occupied than the Commonwealth as a whole. More than one resident in five is under 18. Nearly nine homes in ten are lived in by their owners. The median household income is $154,684 and the poverty rate is 3.2 percent. One resident in nine was born outside the United States, and about one household in seven 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).
Population & Households
- Population (2020 Census): 14,996
- Households: 5,654
- Persons per household: 2.6
- Foreign-born: 11.3% of residents
- Age 65 and over: 19.3%
- Under 18: 22.4%
Race & Ethnicity
- White: 84.4%
- Asian: 6.6%
- Black or African American: 0.7%
- Hispanic or Latino (any race): 4.7%
- Two or more races: 6.0%
- Speak a language other than English at home: 14.7%
Economy & Housing
- Median household income: $154,684
- Poverty rate: 3.2%
- Median home value: $620,500
- Median gross rent: $1,651
- Homeownership: 86.8% of units
- In the labor force: 69.7%
Registered Voters
Massachusetts publishes voter-registration counts by town through the Secretary of the Commonwealth. As in most of the state, Holliston’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: 11,508
- Unenrolled (no party): 7,680 (66.74%)
- Democrats: 2,694 (23.41%)
- Republicans: 1,035 (8.99%)
Here is what those registrations did on May 19, 2026. Across Holliston’s four precincts 1,042 residents cast a ballot, and that one ballot filled the Select Board seat, the Assessor’s seat, two School Committee seats, the Board of Health seat, two Library Trustee seats, two Finance Committee seats, the Park Commissioner’s seat, the Planning Board seat and the Housing Authority seat. Two of those seats went to write-in candidates, which tells you exactly how much room there is on a Holliston ballot for someone who decides to run.
Sources
- U.S. Census Bureau
- MA Secretary of the Commonwealth, Voter Registration
- MA DESE, Holliston
- Town of Holliston, Annual Town Election May 19, 2026, Official Results
See how Holliston fits into the broader Commonwealth.