McLennan County leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 59% of adults in McLennan County typically vote, near the U.S. average of about 62%. Among adults in McLennan County, ~24% vote Democratic, ~35% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How McLennan County compares
Among counties within 50 miles, McLennan County leans more Republican than 1 of 6 neighbors.
McLennan County runs about 5 points more Republican than Texas as a whole.
Politics vary noticeably by city within McLennan County. The east side runs the most Democratic (Even) and the northwest side runs the most Republican (R+61), a spread of about 63 points.
Why McLennan 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 McLennan County, not a ranked or complete list of what matters most.
McLennan County votes Republican even though it is densely developed (about 61%, well above the Texas average of 35%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; McLennan County, TX sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in McLennan County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. McLennan County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 36% of households in McLennan County rent, above 88% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Falls County, TX R+25
- Hill County, TX R+58
- Bosque County, TX R+63
- Limestone County, TX R+40
- Bell County, TX R+3
- Coryell County, TX R+27
- Robertson County, TX R+35
- Navarro County, TX R+34
- Milam County, TX R+51
- Hamilton County, TX R+69
Counties with Similar Populations
- Harford County, MD R+4
- Kalamazoo County, MI D+17
- Cumberland County, PA R+9
- Weber County, UT R+21
- Marin County, CA D+48
- St. Clair County, IL D+13
- Yakima County, WA R+6
- St. Tammany Parish, LA R+35
- Jefferson County, TX D+8
- Madison County, IL R+11
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.