63012 leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 84% of adults in 63012 typically vote, above the U.S. average of about 62%. Among adults in 63012, ~24% vote Democratic, ~60% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How 63012 compares
Among zip codes within 15 miles, 63012 leans more Republican than 13 of 21 neighbors.
63012 runs about 23 points more Republican than Missouri as a whole.
Politics vary noticeably by block within 63012. The northwest side is the most Republican-leaning (R+51) and the north side is the least Republican-leaning (R+37), a spread of about 14 points.
Why 63012 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 63012, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 79% of households in 63012 are family households, about 13 points above the U.S. average of 67%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 63012, MO sits in the top tenth nationally on this measure.
Why turnout in 63012 looks the way it does
Homeowners vote more often than renters. About 93% of households in 63012 own their home, about 15 points above the Missouri average of 78%. High high-school completion lines up with higher turnout, and about 96% of adults in 63012 have completed high school, above 82% 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.