Jackson County leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 65% of adults in Jackson County typically vote, near the U.S. average of about 62%. Among adults in Jackson County, ~40% vote Democratic, ~25% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Jackson County compares
Among counties within 50 miles, Jackson County leans more Democratic than 10 of 12 neighbors.
Jackson County runs about 42 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while Jackson County is one of the few Democratic-leaning pockets.
Politics vary noticeably by city within Jackson County. The west side runs the most Democratic (D+68) and the northeast side runs the most Republican (R+11), a spread of about 79 points.
Why Jackson 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 Jackson County, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 84% of residents in Jackson County live in densely developed areas, about 48 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Jackson County sits in the top quarter (about 33%, above 83% of counties). Jackson County runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Jackson County, MO 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 Jackson County looks the way it does
Turnout in Jackson County 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 Counties
- Wyandotte County, KS D+26
- Johnson County, KS D+9
- Clay County, MO R+7
- Cass County, MO R+32
- Platte County, MO R+5
- Ray County, MO R+53
- Leavenworth County, KS R+20
- Lafayette County, MO R+51
- Miami County, KS R+39
- Johnson County, MO R+35
Counties with Similar Populations
- Davidson County, TN D+26
- Denver County, CO D+53
- Lake County, IL D+22
- Hudson County, NJ D+27
- Polk County, FL R+18
- Norfolk County, MA D+30
- El Paso County, CO R+7
- Will County, IL D+6
- District of Columbia, DC D+80
- Bernalillo County, NM D+21
All Local Stats
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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.