South Middleboro leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 71% of adults in South Middleboro typically vote, above the U.S. average of about 62%. Among adults in South Middleboro, ~29% vote Democratic, ~42% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How South Middleboro compares
Among cities within 25 miles, South Middleboro leans more Republican than 109 of 110 neighbors.
South Middleboro runs about 44 points more Republican than Massachusetts as a whole. Massachusetts leans Democratic overall, while South Middleboro is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within South Middleboro. The southwest side is the most Republican-leaning (R+26) and the south side is the least Republican-leaning (R+8), a spread of about 18 points.
Why South Middleboro 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 South Middleboro, not a ranked or complete list of what matters most.
South Middleboro votes against the grain of Massachusetts. Massachusetts leans Democratic overall, while South Middleboro runs about 44 points more Republican.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as South Middleboro, MA does.
Why turnout in South Middleboro looks the way it does
Areas with strong routine healthcare access turn out at higher rates. South Middleboro 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 73%, about 13 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Rochester, MA R+8
- West Wareham, MA R+9
- Middleborough, MA R+17
- Lakeside, MA R+14
- Tihonet, MA R+14
- Wareham, MA R+10
- Carver, MA R+15
- Middleboro, MA R+12
- Wareham Center, MA Even
Cities with Similar Populations
- South Weare, NH R+14
- Bokchito, OK R+73
- Grantham, NC R+59
- Andover, NY R+42
- Wampum, PA R+47
- McCammon, ID R+64
- Church Road, VA R+52
- Stonebluff, OK R+57
- Barton, VT R+20
- Saxapahaw, NC R+32
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.