Grafton leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 84% of adults in Grafton typically vote, above the U.S. average of about 62%. Among adults in Grafton, ~47% vote Democratic, ~37% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Grafton compares
Among cities within 25 miles, Grafton leans more Democratic than 88 of 140 neighbors.
Grafton runs about 12 points more Republican than Massachusetts as a whole.
Why Grafton 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 Grafton, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 62% of adults in Grafton hold a bachelor's degree, about 34 points above the U.S. average of 28%. Dense areas vote Democratic, and Grafton sits in the top fifth on density (about 39%, above 84% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Grafton, MA sits in the top quarter 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 Grafton looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Grafton 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 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Grafton have completed high school, above 84% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- South Grafton, MA D+11
- North Grafton, MA D+11
- Millbury, MA Even
- Northbridge, MA Even
- Upton, MA D+10
- Sutton, MA D+4
- Whitinsville, MA Even
- Shrewsbury, MA D+22
- Westborough, MA D+31
- Linwood, MA R+6
Cities with Similar Populations
- Chiefland, FL R+63
- Garden City Park, NY Even
- Rumson, NJ R+9
- Columbia Station, OH R+31
- Monroeville, AL R+3
- Nevada, IA R+12
- Valley Falls, SC R+12
- Manhasset, NY Even
- Dora, AL R+74
- West Union, OH R+64
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.