64123 leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 33% of adults in 64123 typically vote, below the U.S. average of about 62%. Among adults in 64123, ~23% vote Democratic, ~10% Republican, and ~67% don't vote. The map below shows estimated turnout by block group.
How 64123 compares
Among zip codes within 15 miles, 64123 leans more Democratic than 55 of 78 neighbors.
64123 runs about 56 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 64123 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 64123. The southwest side is the most Democratic-leaning (D+50) and the east side is the least Democratic-leaning (D+31), a spread of about 19 points.
Why 64123 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 64123, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 93% of residents in 64123 live in densely developed areas, about 57 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 40% of adults in 64123 have never been married, above 87% of zip codes. 64123 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; 64123, 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 64123 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 64123 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 47%, about 10 points below the Missouri average of 57%. High food insecurity lines up with lower turnout, and about 31% of adults in 64123 report food insecurity, above 94% of zip codes. High-crime urban areas turn out at lower rates, and 64123 sits in the top 15% on a violent-crime measure. 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.