63740 is a Republican stronghold. About 19% of voters here vote Democratic and 81% Republican.
About 76% of adults in 63740 typically vote, above the U.S. average of about 62%. Among adults in 63740, ~14% vote Democratic, ~62% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 63740 compares
Among zip codes within 15 miles, 63740 leans more Republican than 8 of 20 neighbors.
63740 runs about 44 points more Republican than Missouri as a whole.
Politics vary noticeably by block within 63740. The northwest side is the most Republican-leaning (R+74) and the south side is the least Republican-leaning (R+52), a spread of about 22 points.
Why 63740 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 63740. The lean here lands roughly where demographic data alone would predict.
Frequent mental distress and voter turnout
Places with a low frequent-mental-distress rate tend to turn out at a higher rate; 63740, MO sits in the bottom tenth nationally on this measure. Reported mental distress does not drive turnout; it reflects economic and health conditions tied to voting.
Why turnout in 63740 looks the way it does
Turnout in 63740 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.