San Jacinto County is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 66% of adults in San Jacinto County typically vote, near the U.S. average of about 62%. Among adults in San Jacinto County, ~14% vote Democratic, ~52% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How San Jacinto County compares
Among counties within 50 miles, San Jacinto County leans more Republican than 4 of 6 neighbors.
San Jacinto County runs about 43 points more Republican than Texas as a whole.
Politics vary noticeably by city within San Jacinto County. The east side is the most Republican-leaning (R+67) and the south side is the least Republican-leaning (R+48), a spread of about 19 points.
Why San Jacinto 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 San Jacinto County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 76% of households in San Jacinto County are family households, about 10 points above the U.S. average of 67%. Low college attainment predicts Republican voting, and San Jacinto County sits in the bottom quarter (about 15%, below 88% of counties).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; San Jacinto County, TX sits in the bottom quarter 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 San Jacinto County looks the way it does
Homeowners vote more often than renters. About 84% of households in San Jacinto County own their home, about 9 points above the Texas average of 75%. Limited routine healthcare access lines up with lower turnout, and San Jacinto County sits in the bottom quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Polk County, TX R+50
- Walker County, TX R+20
- Montgomery County, TX R+35
- Liberty County, TX R+50
- Trinity County, TX R+58
- Tyler County, TX R+70
- Grimes County, TX R+42
- Madison County, TX R+43
- Harris County, TX D+13
- Hardin County, TX R+68
Counties with Similar Populations
- Orleans County, VT R+17
- Tillamook County, OR R+9
- Logan County, KY R+56
- White County, TN R+66
- Adams County, OH R+64
- Fluvanna County, VA R+16
- Union County, SC R+28
- McDonough County, IL R+11
- San Miguel County, NM D+24
- West Baton Rouge Parish, LA R+9
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.