Montgomery County is a Democratic stronghold. About 76% of voters here vote Democratic and 24% Republican.
About 69% of adults in Montgomery County typically vote, above the U.S. average of about 62%. Among adults in Montgomery County, ~52% vote Democratic, ~17% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Montgomery County compares
Among counties within 50 miles, Montgomery County leans more Democratic than 19 of 24 neighbors.
Montgomery County runs about 23 points more Democratic than Maryland as a whole.
Politics vary noticeably by city within Montgomery County. The southeast side is the most Democratic-leaning (D+70) and the north side is the least Democratic-leaning (D+38), a spread of about 33 points.
Why Montgomery County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Montgomery County, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 60% of adults in Montgomery County hold a bachelor's degree, about 32 points above the U.S. average of 28%. Dense areas vote Democratic, and Montgomery County sits in the top fifth on density (about 85%, above 97% of counties). A high never-married share predicts Democratic voting, and about 33% of adults in Montgomery County have never been married, above 77% of counties.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Montgomery County, MD sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Montgomery County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Montgomery County 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 69%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- District of Columbia, DC D+80
- Falls Church City, VA D+45
- Arlington County, VA D+57
- Howard County, MD D+40
- Prince George's County, MD D+71
- Fairfax County, VA D+37
- Alexandria City, VA D+55
- Fairfax City, VA D+25
- Loudoun County, VA D+18
- Frederick County, MD D+10
Counties with Similar Populations
- Collin County, TX R+6
- Fulton County, GA D+46
- Pima County, AZ D+16
- Honolulu County, HI D+18
- Fresno County, CA D+3
- Mecklenburg County, NC D+35
- Westchester County, NY D+27
- St. Louis County, MO D+28
- Duval County, FL D+7
- Wake County, NC D+28
Sources and methodology
Precinct-level voting records used to fit the model come from Maryland 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.