Randolph leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 62% of adults in Randolph typically vote, near the U.S. average of about 62%. Among adults in Randolph, ~46% vote Democratic, ~16% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How Randolph compares
Among cities within 25 miles, Randolph leans more Democratic than 122 of 148 neighbors.
Randolph runs about 24 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by neighborhood within Randolph. The west side is the most Democratic-leaning (D+55) and the northeast side is the least Democratic-leaning (D+37), a spread of about 18 points.
Why Randolph 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 Randolph, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 87% of residents in Randolph live in densely developed areas, about 51 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Randolph sits in the top quarter (about 36%, above 83% of cities). A high never-married share predicts Democratic voting, and about 40% of adults in Randolph have never been married, above 94% of cities.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Randolph, MA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Randolph looks the way it does
Renters vote less often than owners. About 28% of households in Randolph rent, above 81% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Holbrook, MA D+12
- Avon, MA D+15
- Braintree Town, MA D+11
- Canton, MA D+26
- Stoughton, MA D+23
- Milton, MA D+45
- Weymouth Town, MA D+14
- Quincy, MA D+28
- Abington, MA Even
- Brockton, MA D+42
Cities with Similar Populations
- Inver Grove Heights, MN D+10
- Daphne, AL R+40
- University Place, WA D+29
- West Hills, CA D+16
- Mchenry, IL R+10
- El Mirage, AZ D+3
- Burien, WA D+38
- Newhall, CA D+7
- Fairhope, AL R+49
- Kinston, NC D+15
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.