75020 leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 63% of adults in 75020 typically vote, near the U.S. average of about 62%. Among adults in 75020, ~21% vote Democratic, ~42% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How 75020 compares
Among zip codes within 15 miles, 75020 leans more Republican than 1 of 12 neighbors.
75020 runs about 20 points more Republican than Texas as a whole.
Politics vary noticeably by block within 75020. The northwest side is the most Republican-leaning (R+55) and the east side is the least Republican-leaning (R+17), a spread of about 38 points.
Why 75020 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 75020, not a ranked or complete list of what matters most.
75020 votes Republican even though it is densely developed (about 63%, well above the Texas average of 35%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 75020, TX sits in the top 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 75020 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 75020 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 Zip Codes
Zip Codes with Similar Populations
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.