63106 is a Democratic stronghold. About 91% of voters here vote Democratic and 9% Republican.
About 53% of adults in 63106 typically vote, below the U.S. average of about 62%. Among adults in 63106, ~49% vote Democratic, ~5% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How 63106 compares
Among zip codes within 15 miles, 63106 leans more Democratic than 64 of 74 neighbors.
63106 runs about 101 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63106 is one of the few Democratic-leaning pockets.
Why 63106 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 63106, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 96% of residents in 63106 live in densely developed areas, about 60 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 57% of adults in 63106 have never been married, above 97% of zip codes. 63106 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; 63106, MO sits in the bottom tenth 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 63106 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 63106 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 38%, about 19 points below the Missouri average of 57%. Renters vote less often than owners, and about 84% of households in 63106 rent, compared to around 66% in nearby zip codes. High food insecurity lines up with lower turnout, and about 43% of adults in 63106 report food insecurity, in the top fraction 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.