Crystal City leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 75% of adults in Crystal City typically vote, above the U.S. average of about 62%. Among adults in Crystal City, ~23% vote Democratic, ~52% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Crystal City compares
Among cities within 25 miles, Crystal City leans more Republican than 33 of 94 neighbors.
Crystal City runs about 20 points more Republican than Missouri as a whole.
Politics vary noticeably by neighborhood within Crystal City. The east side is the most Republican-leaning (R+45) and the west side is the least Republican-leaning (R+18), a spread of about 27 points.
Why Crystal City 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 City, not a ranked or complete list of what matters most.
Crystal City votes Republican even though it is densely developed (about 61%, far above the Missouri average of 22%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Crystal City, MO sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Crystal City looks the way it does
Turnout in Crystal City sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Herculaneum, MO R+35
- Festus, MO R+42
- Pevely, MO R+43
- Selma, MO R+50
- Plattin, MO R+57
- Valmeyer, IL R+56
- Olympian Village, MO R+55
- Barnhart, MO R+42
- Hillsboro, MO R+52
Cities with Similar Populations
- Osage, IA R+29
- Brillion, WI R+38
- Woodlyn, PA D+17
- Robbins, IL D+77
- Jermyn, PA R+13
- Roaring Spring, PA R+56
- Mascot, TN R+59
- Pearcy, AR R+57
- McArthur, OH R+57
- Akron, PA R+22
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.