Harris County leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 83% of adults in Harris County typically vote, above the U.S. average of about 62%. Among adults in Harris County, ~23% vote Democratic, ~60% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Harris County compares
Among counties within 50 miles, Harris County leans more Republican than 14 of 18 neighbors.
Harris County runs about 42 points more Republican than Georgia as a whole.
Politics vary noticeably by city within Harris County. The southwest side is the most Republican-leaning (R+53) and the north side is the least Republican-leaning (R+15), a spread of about 39 points.
Why Harris 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 Harris County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 78% of households in Harris County are family households, about 12 points above the U.S. average of 67%. Rural areas vote Republican, and Harris County sits in the bottom quarter on density (about 12%, below 78% of counties).
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Harris County, GA sits in the top quarter 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 Harris County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Harris 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 65%, above 77% of counties. Homeowners vote more often than renters, and about 90% of households in Harris County own their home, compared to around 63% in nearby counties. High high-school completion lines up with higher turnout, and about 94% of adults in Harris County have completed high school, above 85% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Muscogee County, GA D+25
- Talbot County, GA D+12
- Russell County, AL D+6
- Chambers County, AL R+13
- Chattahoochee County, GA R+14
- Troup County, GA R+11
- Meriwether County, GA R+22
- Lee County, AL R+13
- Marion County, GA R+29
- Upson County, GA R+30
Counties with Similar Populations
- Effingham County, IL R+56
- Lincoln County, NE R+46
- Clark County, WI R+43
- Alcorn County, MS R+59
- Chambers County, AL R+13
- Cowley County, KS R+38
- Wasatch County, UT R+33
- Barry County, MO R+62
- Taos County, NM D+42
- Howard County, TX R+50
Sources and methodology
Precinct-level voting records used to fit the model come from Georgia 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.