Charlton leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 92% of adults in Charlton typically vote, above the U.S. average of about 62%. Among adults in Charlton, ~40% vote Democratic, ~52% Republican, and ~8% don't vote. The map below shows estimated turnout by block group.
How Charlton compares
Among cities within 25 miles, Charlton leans more Republican than 78 of 100 neighbors.
Charlton runs about 39 points more Republican than Massachusetts as a whole. Massachusetts leans Democratic overall, while Charlton is one of the few Republican-leaning pockets.
Why Charlton 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 Charlton, not a ranked or complete list of what matters most.
Charlton votes against the grain of Massachusetts. Massachusetts leans Democratic overall, while Charlton runs about 39 points more Republican. A high family-household share predicts Republican voting, and about 76% of households in Charlton are family households, above 79% of cities.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Charlton, MA sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Charlton looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Charlton 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
- Mystic Grove, MA R+10
- North Oxford, MA R+12
- Rochdale, MA R+7
- Oxford, MA R+11
- Southbridge Town, MA D+5
- Charlton City, MA D+10
- South Spencer, MA R+11
- Sturbridge, MA D+7
- Dudley, MA R+12
- East Brookfield, MA R+14
Cities with Similar Populations
- Huntertown, IN R+36
- Westwood, MI D+36
- Conway, FL R+9
- Monett, MO R+50
- Laurel, MT R+42
- Wanaque, NJ R+13
- Amherst, NH D+17
- St. Marys, OH R+54
- River Edge, NJ D+14
- Millersville, PA D+4
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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.