St. Ann leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 55% of adults in St. Ann typically vote, below the U.S. average of about 62%. Among adults in St. Ann, ~34% vote Democratic, ~21% Republican, and ~45% don't vote. The map below shows estimated turnout by block group.
How St. Ann compares
Among cities within 25 miles, St. Ann leans more Democratic than 111 of 176 neighbors.
St. Ann runs about 43 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while St. Ann is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within St. Ann. The north side is the most Democratic-leaning (D+34) and the southwest side is the least Democratic-leaning (D+13), a spread of about 21 points.
Why St. Ann leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for St. Ann, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 99% of residents in St. Ann live in densely developed areas, about 62 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 43% of adults in St. Ann have never been married, above 96% of cities. St. Ann runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; St. Ann, MO sits in the top tenth nationally on this measure.
Why turnout in St. Ann looks the way it does
Renters vote less often than owners. About 43% of households in St. Ann rent, about 18 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 20% of adults in St. Ann report food insecurity, above 80% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Edmundson, MO D+27
- Breckenridge Hills, MO D+33
- Woodson Terrace, MO D+30
- Bridgeton, MO D+16
- Overland, MO D+24
- St. John, MO D+32
- Sycamore Hills, MO D+29
- Charlack, MO D+49
- Berkeley, MO D+72
- Maryland Heights, MO D+27
Cities with Similar Populations
- Loris, SC R+37
- Bedford, MA D+41
- Leitchfield, KY R+57
- Budd Lake, NJ Even
- Buckhannon, WV R+47
- Federal Heights, CO D+18
- San Elizario, TX D+12
- Ardmore, PA D+53
- Chicago Ridge, IL R+3
- Franklinton, NC R+10
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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.