63102 is a Democratic stronghold. About 84% of voters here vote Democratic and 16% Republican.
About 44% of adults in 63102 typically vote, below the U.S. average of about 62%. Among adults in 63102, ~37% vote Democratic, ~7% Republican, and ~56% don't vote. The map below shows estimated turnout by block group.
How 63102 compares
Among zip codes within 15 miles, 63102 leans more Democratic than 47 of 73 neighbors.
63102 runs about 86 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63102 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 63102. The northeast side is the most Democratic-leaning (D+76) and the west side is the least Democratic-leaning (D+66), a spread of about 10 points.
Why 63102 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 63102, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 83% of residents in 63102 live in densely developed areas, about 47 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 63102 sits in the top quarter (about 53%, above 91% of zip codes). 63102 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; 63102, 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 63102 looks the way it does
Renters vote less often than owners. About 83% of households in 63102 rent, about 58 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 7% of homes in 63102 have more than one occupant per room, above 93% of zip codes. High-crime urban areas turn out at lower rates, and 63102 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.