Holbrook leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 80% of adults in Holbrook typically vote, above the U.S. average of about 62%. Among adults in Holbrook, ~45% vote Democratic, ~35% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Holbrook compares
Among cities within 25 miles, Holbrook leans more Democratic than 49 of 139 neighbors.
Holbrook runs about 13 points more Republican than Massachusetts as a whole.
Politics vary noticeably by neighborhood within Holbrook. The west side is the most Democratic-leaning (D+19) and the southeast side is the least Democratic-leaning (D+4), a spread of about 15 points.
Why Holbrook leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Holbrook, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 60% of residents in Holbrook live in densely developed areas, about 24 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Holbrook sits in the top quarter (about 35%, above 82% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Holbrook, MA sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Holbrook looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Holbrook is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 70%, about 10 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Avon, MA D+15
- Randolph, MA D+49
- Abington, MA Even
- Braintree Town, MA D+11
- Brockton, MA D+42
- Weymouth Town, MA D+14
- Rockland, MA R+3
- Stoughton, MA D+23
- Whitman, MA R+4
- Canton, MA D+26
Cities with Similar Populations
- South Dartmouth, MA D+8
- Athol, MA R+8
- Prince George, VA D+7
- Newaygo, MI R+40
- Venus, TX R+42
- Montpelier, VT D+42
- Crystal Lake, FL R+11
- Ringwood, NJ R+14
- Morro Bay, CA D+16
- Lutherville-Timonium, MD D+21
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Sources and methodology
Precinct-level voting records used to fit the model come from Massachusetts Secretary of the Commonwealth, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.