Montgomery County leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 68% of adults in Montgomery County typically vote, above the U.S. average of about 62%. Among adults in Montgomery County, ~22% vote Democratic, ~46% Republican, and ~32% 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 Republican than 4 of 8 neighbors.
Montgomery County runs about 21 points more Republican than Texas as a whole.
Politics vary noticeably by city within Montgomery County. The northeast side is the most Republican-leaning (R+52) and the south side is the least Republican-leaning (R+17), a spread of about 35 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.
Montgomery County votes Republican even though it is densely developed (about 66%, far above the Texas average of 35%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 76% of households in Montgomery County are family households, above 96% of counties.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Montgomery County, TX sits in the top quarter nationally on this measure.
Why turnout in Montgomery County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Montgomery County 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 Counties
- Harris County, TX D+13
- San Jacinto County, TX R+57
- Liberty County, TX R+50
- Waller County, TX R+20
- Walker County, TX R+20
- Grimes County, TX R+42
- Fort Bend County, TX D+6
- Polk County, TX R+50
- Chambers County, TX R+58
- Austin County, TX R+54
Counties with Similar Populations
- Johnson County, KS D+9
- Williamson County, TX Even
- Brevard County, FL R+19
- Ocean County, NJ R+39
- Washington County, OR D+32
- Monmouth County, NJ R+8
- Bucks County, PA Even
- Anne Arundel County, MD D+17
- Arapahoe County, CO D+22
- Baltimore City, MD D+72
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Sources and methodology
Precinct-level voting records used to fit the model come from Texas Secretary of State, Elections Division, 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.