63857 leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 61% of adults in 63857 typically vote, near the U.S. average of about 62%. Among adults in 63857, ~18% vote Democratic, ~43% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 63857 compares
Among zip codes within 15 miles, 63857 is the least Republican-leaning.
63857 runs about 22 points more Republican than Missouri as a whole.
Politics vary noticeably by block within 63857. The northeast side is the most Republican-leaning (R+62) and the north side is the least Republican-leaning (R+25), a spread of about 37 points.
Why 63857 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 63857. The lean here lands roughly where demographic data alone would predict.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as 63857, MO does.
Why turnout in 63857 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 63857 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 49%, about 8 points below the Missouri average of 57%. Renters vote less often than owners, and about 38% of households in 63857 rent, above 85% of zip codes. High food insecurity lines up with lower turnout, and about 22% of adults in 63857 report food insecurity, above 84% 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.