63673 is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 73% of adults in 63673 typically vote, above the U.S. average of about 62%. Among adults in 63673, ~15% vote Democratic, ~58% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How 63673 compares
Among zip codes within 15 miles, 63673 is the most Republican-leaning.
63673 runs about 42 points more Republican than Missouri as a whole.
Politics vary noticeably by block within 63673. The southeast side is the most Republican-leaning (R+69) and the northeast side is the least Republican-leaning (R+52), a spread of about 17 points.
Why 63673 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 63673, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 94% of residents in 63673 drive to work alone, about 20 points above the U.S. average of 74%. A high white share with below-average college attainment predicts Republican voting, and 63673 fits that profile on both counts.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 63673, MO sits below the national average 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 63673 looks the way it does
Turnout in 63673 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.