Leavenworth County leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 67% of adults in Leavenworth County typically vote, near the U.S. average of about 62%. Among adults in Leavenworth County, ~27% vote Democratic, ~40% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How Leavenworth County compares
Among counties within 50 miles, Leavenworth County leans more Republican than 7 of 18 neighbors.
Leavenworth County runs about 4 points more Republican than Kansas as a whole.
Politics vary noticeably by city within Leavenworth County. The northeast side runs the most Democratic (D+6) and the northwest side runs the most Republican (R+52), a spread of about 58 points.
Why Leavenworth County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Leavenworth County, not a ranked or complete list of what matters most.
Leavenworth County votes Republican even though it is densely developed (about 48%, well above the Kansas average of 19%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Leavenworth County, KS sits in the top quarter nationally on this measure.
Why turnout in Leavenworth County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Leavenworth County 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 66%, about 6 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 94% of adults in Leavenworth County have completed high school, above 85% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Platte County, MO R+5
- Wyandotte County, KS D+26
- Jefferson County, KS R+50
- Johnson County, KS D+9
- Clay County, MO R+7
- Atchison County, KS R+34
- Douglas County, KS D+35
- Jackson County, MO D+24
- Buchanan County, MO R+23
- Doniphan County, KS R+58
Counties with Similar Populations
- Cape Girardeau County, MO R+34
- Payne County, OK R+18
- Talladega County, AL R+27
- Lewis County, WA R+29
- Henderson County, TX R+60
- Yuba County, CA R+16
- Bartholomew County, IN R+30
- Bullitt County, KY R+48
- Manitowoc County, WI R+24
- St. Landry Parish, LA R+11
Sources and methodology
Precinct-level voting records used to fit the model come from Kansas 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.