Dardenne Prairie leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 91% of adults in Dardenne Prairie typically vote, above the U.S. average of about 62%. Among adults in Dardenne Prairie, ~37% vote Democratic, ~54% Republican, and ~9% don't vote. The map below shows estimated turnout by block group.
How Dardenne Prairie compares
Among cities within 25 miles, Dardenne Prairie leans more Republican than 79 of 148 neighbors.
Politically, Dardenne Prairie sits close to the rest of Missouri.
Why Dardenne Prairie 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 Dardenne Prairie, not a ranked or complete list of what matters most.
Dardenne Prairie votes Republican even though it is densely developed (about 93%, far above the Missouri average of 22%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 79% of households in Dardenne Prairie are family households, above 87% of cities.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Dardenne Prairie, MO sits in the top quarter 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 Dardenne Prairie looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Dardenne Prairie is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 69%, about 9 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Dardenne Prairie have completed high school, above 97% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- O'fallon, MO R+16
- Lake St. Louis, MO R+16
- Cottleville, MO R+16
- Weldon Spring Heights, MO R+31
- Weldon Spring, MO R+23
- St. Peters, MO R+9
- St. Paul, MO R+32
- Josephville, MO R+35
- Defiance, MO R+42
- Wentzville, MO R+24
Cities with Similar Populations
- North Arlington, NJ R+12
- Artesia, CA D+16
- Grosse Pointe Woods, MI D+17
- Sauk Rapids, MN R+22
- Bennettsville, SC D+25
- Three Rivers, MI R+26
- Brookshire, TX R+20
- Newport, KY D+6
- El Dorado, KS R+33
- Monument, CO R+25
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.