63118 is a Democratic stronghold. About 86% of voters here vote Democratic and 14% Republican.
About 46% of adults in 63118 typically vote, below the U.S. average of about 62%. Among adults in 63118, ~40% vote Democratic, ~7% Republican, and ~53% don't vote. The map below shows estimated turnout by block group.
How 63118 compares
Among zip codes within 15 miles, 63118 leans more Democratic than 52 of 72 neighbors.
63118 runs about 91 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63118 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 63118. The north side is the most Democratic-leaning (D+79) and the southeast side is the least Democratic-leaning (D+65), a spread of about 14 points.
Why 63118 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 63118, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 63118 live in densely developed areas, about 63 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 63118 sits in the top quarter (about 39%, above 80% of zip codes). 63118 runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 63118, MO sits in the top tenth nationally on this measure.
Why turnout in 63118 looks the way it does
Renters vote less often than owners. About 56% of households in 63118 rent, about 31 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and 63118 sits in the bottom quarter on routine-care measures. High-crime urban areas turn out at lower rates, and 63118 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.