Crystal Lake Park leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 78% of adults in Crystal Lake Park typically vote, above the U.S. average of about 62%. Among adults in Crystal Lake Park, ~37% vote Democratic, ~41% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Crystal Lake Park compares
Among cities within 25 miles, Crystal Lake Park leans more Republican than 104 of 173 neighbors.
Crystal Lake Park runs about 12 points more Democratic than Missouri as a whole.
Why Crystal Lake Park 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 Crystal Lake Park, not a ranked or complete list of what matters most.
Crystal Lake Park votes Republican even though it is densely developed (more than 99%, 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 83% of households in Crystal Lake Park are family households, above 94% of cities.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Crystal Lake Park, MO does.
Why turnout in Crystal Lake Park looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Crystal Lake Park 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 76%, about 16 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 97% of households in Crystal Lake Park own their home, about 22 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in Crystal Lake Park have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Frontenac, MO Even
- Huntleigh, MO R+23
- Westwood, MO D+11
- Des Peres, MO Even
- Warson Woods, MO Even
- Kirkwood, MO D+20
- Glendale, MO D+30
- Town and Country, MO R+3
- Creve Coeur, MO D+24
- Ladue, MO D+7
Cities with Similar Populations
- Ontario, IN R+60
- Marvell, AR Even
- Caliente, NV R+60
- Coulee City, WA R+42
- Sodus Point, NY R+14
- Sycamore, AL R+51
- Burlington, IL R+37
- Kynesville, FL R+60
- Crandall, IN R+49
- Oak Hill, OK R+77
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.