North Billerica leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 79% of adults in North Billerica typically vote, above the U.S. average of about 62%. Among adults in North Billerica, ~42% vote Democratic, ~37% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How North Billerica compares
Among cities within 25 miles, North Billerica leans more Democratic than 34 of 154 neighbors.
North Billerica runs about 19 points more Republican than Massachusetts as a whole.
Why North Billerica 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 North Billerica, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 68% of residents in North Billerica live in densely developed areas, about 32 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and North Billerica sits in the top quarter (about 40%, above 87% of cities). A high never-married share predicts Democratic voting, and about 37% of adults in North Billerica have never been married, above 90% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; North Billerica, MA sits in the top tenth nationally on this measure.
Why turnout in North Billerica looks the way it does
Areas with strong routine healthcare access turn out at higher rates. North Billerica 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 72%, about 12 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Billerica, MA D+5
- Chelmsford, MA D+17
- Tewksbury, MA Even
- Pinehurst, MA R+4
- Carlisle, MA D+30
- Lowell, MA D+25
- Bedford, MA D+41
- Wilmington, MA Even
- North Chelmsford, MA D+10
Cities with Similar Populations
- Waterford, CA R+30
- Sealy, TX R+48
- Stilwell, KS R+10
- Strasburg, VA R+42
- Ellisville, MO Even
- North Logan, UT R+25
- St. Clair, MI R+33
- Annapolis Neck, MD D+27
- Lutherville-Timonium, MD D+21
- Morro Bay, CA D+16
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.