Kirby leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 49% of adults in Kirby typically vote, below the U.S. average of about 62%. Among adults in Kirby, ~29% vote Democratic, ~20% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How Kirby compares
Among cities within 25 miles, Kirby leans more Democratic than 48 of 49 neighbors.
Kirby runs about 33 points more Democratic than Texas as a whole. Texas leans Republican overall, while Kirby is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Kirby. The northeast side is the most Democratic-leaning (D+29) and the north side is the least Democratic-leaning (D+7), a spread of about 21 points.
Why Kirby 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 Kirby, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in Kirby live in densely developed areas, about 61 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 34% of adults in Kirby have never been married, above 85% of cities. Kirby 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; Kirby, TX sits in the top tenth nationally on this measure.
Why turnout in Kirby looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Kirby 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 24%, about 5 points above the Texas average of 19%. Renters vote less often than owners, and about 30% of households in Kirby rent, above 84% of cities. Low high-school completion lines up with lower turnout, and about 74% of adults in Kirby have completed high school, below 97% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Terrell Hills, TX R+9
- Windcrest, TX D+4
- Alamo Heights, TX D+7
- Converse, TX D+17
- China Grove, TX R+30
- Olmos Park, TX D+8
- Live Oak, TX D+5
- Universal City, TX R+2
- Randolph AFB, TX R+6
- Castle Hills, TX D+3
Cities with Similar Populations
- Tanaina, AK R+32
- Robinson, IL R+41
- Middlebury, VT D+47
- Midland, NC R+36
- Williamsport, MD R+31
- Wilmer, AL R+77
- Whitehouse Station, NJ R+14
- Winnsboro, SC D+22
- Roxborough Park, CO R+13
- Waterloo, NY R+25
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.