Round Rock, TX Political Map | Democrat & Republican Areas in Round Rock

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

Round Rock leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.

 

About 65% of adults in Round Rock typically vote, near the U.S. average of about 62%. Among adults in Round Rock, ~36% vote Democratic, ~29% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.

How Round Rock compares

Among cities within 25 miles, Round Rock leans more Democratic than 32 of 45 neighbors.

Round Rock runs about 25 points more Democratic than Texas as a whole. Texas leans Republican overall, while Round Rock is one of the few Democratic-leaning pockets.

Politics vary noticeably by neighborhood within Round Rock. The south side runs the most Democratic (D+23) and the northwest side runs the most Republican (Even), a spread of about 24 points.

Why Round Rock leans the way it does

This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Round Rock, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 83% of residents in Round Rock live in densely developed areas, about 47 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Round Rock sits in the top quarter (about 49%, above 93% of cities). Round Rock runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.

Population density and Democratic lean

Places with high population density tend to lean Democratic; Round Rock, TX sits in the top tenth nationally on this measure.

Why turnout in Round Rock looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Round Rock 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.

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.