63146 leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 68% of adults in 63146 typically vote, above the U.S. average of about 62%. Among adults in 63146, ~46% vote Democratic, ~22% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 63146 compares
Among zip codes within 15 miles, 63146 leans more Democratic than 28 of 64 neighbors.
63146 runs about 53 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63146 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 63146. The north side is the most Democratic-leaning (D+47) and the northeast side is the least Democratic-leaning (D+22), a spread of about 25 points.
Why 63146 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 63146, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 61% of adults in 63146 hold a bachelor's degree, about 33 points above the U.S. average of 28%. Dense areas vote Democratic, and 63146 sits in the top fifth on density (about 96%, above 92% of zip codes). 63146 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; 63146, MO sits in the top quarter 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 63146 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 63146 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 69%, about 9 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 63146 have completed high school, above 87% 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.