Sedgwick County leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 59% of adults in Sedgwick County typically vote, near the U.S. average of about 62%. Among adults in Sedgwick County, ~28% vote Democratic, ~31% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How Sedgwick County compares
Among counties within 50 miles, Sedgwick County is the least Republican-leaning.
Sedgwick County runs about 9 points more Democratic than Kansas as a whole.
Politics vary noticeably by city within Sedgwick County. The east side runs the most Democratic (D+13) and the southwest side runs the most Republican (R+40), a spread of about 53 points.
Why Sedgwick 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 Sedgwick County, not a ranked or complete list of what matters most.
Sedgwick County votes Republican even though it is densely developed (about 80%, far above the Kansas average of 19%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Sedgwick County, KS sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Sedgwick County looks the way it does
Renters vote less often than owners. About 35% of households in Sedgwick County rent, about 10 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Butler County, KS R+41
- Harvey County, KS R+33
- Sumner County, KS R+50
- Cowley County, KS R+38
- Reno County, KS R+35
- Kingman County, KS R+58
- Marion County, KS R+52
- Harper County, KS R+65
- McPherson County, KS R+44
- Greenwood County, KS R+61
Counties with Similar Populations
- Passaic County, NJ D+4
- Camden County, NJ D+30
- Greenville County, SC R+14
- Adams County, CO D+11
- Plymouth County, MA D+11
- Kane County, IL D+13
- Chester County, PA D+14
- Montgomery County, OH D+6
- Morris County, NJ Even
- Spokane County, WA R+3
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.