Grayson County leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 65% of adults in Grayson County typically vote, near the U.S. average of about 62%. Among adults in Grayson County, ~18% vote Democratic, ~47% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Grayson County compares
Among counties within 50 miles, Grayson County leans more Republican than 2 of 10 neighbors.
Grayson County runs about 30 points more Republican than Texas as a whole.
Politics vary noticeably by city within Grayson County. The southwest side is the most Republican-leaning (R+64) and the northeast side is the least Republican-leaning (R+34), a spread of about 30 points.
Why Grayson County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Grayson County. The lean here lands roughly where demographic data alone would predict.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Grayson County, TX sits above the national average 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 Grayson County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Grayson 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
- Fannin County, TX R+58
- Marshall County, OK R+56
- Bryan County, OK R+54
- Cooke County, TX R+57
- Love County, OK R+64
- Collin County, TX R+6
- Johnston County, OK R+65
- Denton County, TX R+7
- Hunt County, TX R+49
- Carter County, OK R+46
Counties with Similar Populations
- Blount County, TN R+49
- Boone County, KY R+28
- Clark County, OH R+21
- Humboldt County, CA D+27
- Warren County, KY R+16
- Brunswick County, NC R+29
- Washington County, WI R+28
- Calhoun County, MI R+9
- Florence County, SC Even
- Hampton City, VA D+41
All Local Stats
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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.