Northbridge is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About 82% of adults in Northbridge typically vote, above the U.S. average of about 62%. Among adults in Northbridge, ~41% vote Democratic, ~41% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Northbridge compares
Among cities within 25 miles, Northbridge sits roughly in the middle of the political spectrum, with 46 neighbors leaning further in the place's direction and 94 leaning the other way.
Northbridge runs about 25 points more Republican than Massachusetts as a whole.
Why Northbridge leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Northbridge. The lean here lands roughly where demographic data alone would predict.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Northbridge, 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 Northbridge looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Northbridge 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 71%, about 11 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- South Grafton, MA D+11
- Whitinsville, MA Even
- Linwood, MA R+6
- Upton, MA D+10
- Grafton, MA D+13
- Sutton, MA D+4
- Uxbridge, MA R+3
- North Milford, MA D+10
- North Grafton, MA D+11
- Hopedale, MA D+8
Cities with Similar Populations
- Evans City, PA R+33
- Ovilla, TX R+22
- Lyndonville, VT R+19
- Post, TX R+24
- Belden, MS R+37
- Koloa, HI D+25
- Telford, TN R+69
- Hiddenite, NC R+64
- Chelan, WA R+21
- New Ipswich, NH R+15
All Local Stats
Home Services
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.