63137 is a Democratic stronghold. About 89% of voters here vote Democratic and 11% Republican.
About 53% of adults in 63137 typically vote, below the U.S. average of about 62%. Among adults in 63137, ~47% vote Democratic, ~6% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How 63137 compares
Among zip codes within 15 miles, 63137 leans more Democratic than 57 of 72 neighbors.
63137 runs about 96 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while 63137 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 63137. The southwest side is the most Democratic-leaning (D+85) and the southeast side is the least Democratic-leaning (D+64), a spread of about 22 points.
Why 63137 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 63137, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 63137 is about 12%, about 61 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 46% of adults in 63137 have never been married, above 93% of zip codes. 63137 runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 63137, MO sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 63137 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 63137 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 43%, about 14 points below the Missouri average of 57%. Renters vote less often than owners, and about 50% of households in 63137 rent, about 25 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 38% of adults in 63137 report food insecurity, above 98% 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.