Dallas County, TX Political Map | Democrat & Republican Areas in Dallas County

By the BestNeighborhood data science team. Last updated May 2026.

Dallas County leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.

 

About 47% of adults in Dallas County typically vote, below the U.S. average of about 62%. Among adults in Dallas County, ~30% vote Democratic, ~17% Republican, and ~53% don't vote. The map below shows estimated turnout by block group.

How Dallas County compares

Among counties within 50 miles, Dallas County is the most Democratic-leaning.

Dallas County runs about 40 points more Democratic than Texas as a whole. Texas leans Republican overall, while Dallas County is one of the few Democratic-leaning pockets.

Politics vary noticeably by city within Dallas County. The south side is the most Democratic-leaning (D+63) and the northeast side is the least Democratic-leaning (D+14), a spread of about 49 points.

Why Dallas 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 Dallas County, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 92% of residents in Dallas County live in densely developed areas, about 56 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Dallas County sits in the top quarter (about 34%, above 84% of counties). Dallas County runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Dallas County, TX sits in the top tenth 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 Dallas County looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Dallas County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 22%, about 12 points above the U.S. average of 10%. Renters vote less often than owners, and about 44% of households in Dallas County rent, compared to around 26% in nearby counties. Low high-school completion lines up with lower turnout, and about 81% of adults in Dallas County have completed high school, below 93% of counties. Learn more about the findings and methodology on the political spectrum map.

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.