63434 is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 85% of adults in 63434 typically vote, above the U.S. average of about 62%. Among adults in 63434, ~12% vote Democratic, ~73% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How 63434 compares
Among zip codes within 15 miles, 63434 leans more Republican than 5 of 8 neighbors.
63434 runs about 54 points more Republican than Missouri as a whole.
Why 63434 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 63434, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 63434, about 96% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%; about 16% of adults hold a bachelor's degree, about 6 points below the Missouri average of 22%. A high family-household share predicts Republican voting, and about 77% of households in 63434 are family households, above 85% of zip codes.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 63434, MO sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 63434 looks the way it does
Turnout in 63434 sits close to the national pattern. 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.