63108 is a Democratic stronghold. About 85% of voters here vote Democratic and 15% Republican.
About 47% of adults in 63108 typically vote, below the U.S. average of about 62%. Among adults in 63108, ~40% vote Democratic, ~7% Republican, and ~53% don't vote. The map below shows estimated turnout by block group.
How 63108 compares
Among zip codes within 15 miles, 63108 leans more Democratic than 47 of 70 neighbors.
63108 runs about 88 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63108 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 63108. The north side is the most Democratic-leaning (D+81) and the southeast side is the least Democratic-leaning (D+66), a spread of about 15 points.
Why 63108 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 63108, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 63108 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 63108 sits in the top quarter (about 63%, above 95% of zip codes). 63108 runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 63108, MO sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 63108 looks the way it does
Renters vote less often than owners. About 75% of households in 63108 rent, about 50 points above the U.S. average of 25%. High-crime urban areas turn out at lower rates, and 63108 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.