63130 is a Democratic stronghold. About 86% of voters here vote Democratic and 14% Republican.
About 69% of adults in 63130 typically vote, above the U.S. average of about 62%. Among adults in 63130, ~59% vote Democratic, ~10% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 63130 compares
Among zip codes within 15 miles, 63130 leans more Democratic than 50 of 71 neighbors.
63130 runs about 90 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63130 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 63130. The northeast side is the most Democratic-leaning (D+85) and the southwest side is the least Democratic-leaning (D+49), a spread of about 36 points.
Why 63130 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 63130, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 63130 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 63130 sits in the top quarter (about 67%, above 97% of zip codes). 63130 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; 63130, MO sits in the top tenth nationally on this measure.
Why turnout in 63130 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 63130 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 65%, above 64% of zip codes. High high-school completion lines up with higher turnout, and about 97% of adults in 63130 have completed high school, above 89% 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.