64128 is a Democratic stronghold. About 90% of voters here vote Democratic and 10% Republican.
About 44% of adults in 64128 typically vote, below the U.S. average of about 62%. Among adults in 64128, ~39% vote Democratic, ~5% Republican, and ~56% don't vote. The map below shows estimated turnout by block group.
How 64128 compares
Among zip codes within 15 miles, 64128 leans more Democratic than 86 of 87 neighbors.
64128 runs about 98 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 64128 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 64128. The southwest side is the most Democratic-leaning (D+83) and the northeast side is the least Democratic-leaning (D+61), a spread of about 21 points.
Why 64128 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 64128, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 64128 live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 46% of adults in 64128 have never been married, above 93% of zip codes. 64128 runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 64128, MO sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 64128 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 64128 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 42%, about 15 points below the Missouri average of 57%. Renters vote less often than owners, and about 52% of households in 64128 rent, about 27 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 41% of adults in 64128 report food insecurity, above 98% 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.