63116 leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 54% of adults in 63116 typically vote, below the U.S. average of about 62%. Among adults in 63116, ~40% vote Democratic, ~14% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How 63116 compares
Among zip codes within 15 miles, 63116 leans more Democratic than 33 of 71 neighbors.
63116 runs about 67 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63116 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 63116. The northeast side is the most Democratic-leaning (D+67) and the southwest side is the least Democratic-leaning (D+30), a spread of about 38 points.
Why 63116 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 63116, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 63116 live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 45% of adults in 63116 have never been married, above 92% of zip codes. 63116 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; 63116, 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 63116 looks the way it does
Renters vote less often than owners. About 42% of households in 63116 rent, about 17 points above the U.S. average of 25%. 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.