64129 leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 52% of adults in 64129 typically vote, below the U.S. average of about 62%. Among adults in 64129, ~37% vote Democratic, ~14% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How 64129 compares
Among zip codes within 15 miles, 64129 leans more Democratic than 63 of 81 neighbors.
64129 runs about 63 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 64129 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 64129. The southwest side is the most Democratic-leaning (D+58) and the northeast side is the least Democratic-leaning (D+6), a spread of about 51 points.
Why 64129 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 64129, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 64129 is about 38%, about 34 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 48% of adults in 64129 have never been married, above 94% of zip codes. 64129 runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 64129, MO sits in the bottom 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 64129 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 64129 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 41% of households in 64129 rent, about 16 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 27% of adults in 64129 report food insecurity, above 91% of zip codes. 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 Missouri Secretary of State, Elections, 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.