Millbury is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 83% of adults in Millbury typically vote, above the U.S. average of about 62%. Among adults in Millbury, ~41% vote Democratic, ~42% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Millbury compares
Among cities within 25 miles, Millbury sits roughly in the middle of the political spectrum, with 77 neighbors leaning further in the place's direction and 51 leaning the other way.
Millbury runs about 27 points more Republican than Massachusetts as a whole. Massachusetts leans Democratic overall, while Millbury sits closer to the political middle.
Politics vary noticeably by neighborhood within Millbury. The east side runs the most Democratic (Even) and the southwest side runs the most Republican (R+9), a spread of about 10 points.
Why Millbury 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 Millbury, not a ranked or complete list of what matters most.
Millbury votes against the grain of Massachusetts. Massachusetts leans Democratic overall, while Millbury runs about 27 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Millbury, MA sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Millbury looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Millbury 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 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Millbury have completed high school, above 82% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Grafton, MA D+13
- Auburn, MA D+6
- Sutton, MA D+4
- North Grafton, MA D+11
- South Grafton, MA D+11
- Worcester, MA D+12
- Cherry Valley, MA R+6
- Shrewsbury, MA D+22
- Northbridge, MA Even
- North Oxford, MA R+12
Cities with Similar Populations
- Clayton, CA D+14
- Weigelstown, PA R+25
- Luling, LA R+39
- Suffern, NY D+5
- Lake Forest Park, WA D+56
- Sumner, WA D+6
- Brecksville, OH Even
- Bonham, TX R+42
- Bangor, PA R+27
- Fair Oaks, GA D+37
All Local Stats
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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.