Montgomery leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 75% of adults in Montgomery typically vote, above the U.S. average of about 62%. Among adults in Montgomery, ~43% vote Democratic, ~32% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Montgomery compares
Among cities within 25 miles, Montgomery leans more Democratic than 72 of 92 neighbors.
Politically, Montgomery sits close to the rest of Illinois.
Politics vary noticeably by neighborhood within Montgomery. The northeast side is the most Democratic-leaning (D+17) and the southeast side is the least Democratic-leaning (D+6), a spread of about 11 points.
Why Montgomery 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 Montgomery, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 78% of residents in Montgomery live in densely developed areas, about 42 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 35% of adults in Montgomery have never been married, above 88% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Montgomery, IL sits in the top tenth nationally on this measure.
Why turnout in Montgomery looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Montgomery is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Boulder Hill, IL D+7
- Bristol, IL R+4
- Oswego, IL D+8
- Sugar Grove, IL R+10
- Aurora, IL D+29
- Yorkville, IL R+12
- North Aurora, IL D+10
- Eola, IL D+29
- Nottingham Woods, IL R+21
- Plano, IL R+3
Cities with Similar Populations
- Bayville, NJ R+38
- Springtown, TX R+69
- Batesville, AR R+49
- Danville, KY R+20
- Mountain Home, ID R+44
- Troy, MO R+45
- Arnold, MD D+10
- Somerville, NJ D+12
- Tukwila, WA D+38
- Willow Spring, NC R+24
All Local Stats
Home Services
Sources and methodology
Precinct-level voting records used to fit the model come from Illinois State Board of 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.