Morgan County leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 68% of adults in Morgan County typically vote, above the U.S. average of about 62%. Among adults in Morgan County, ~26% vote Democratic, ~42% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How Morgan County compares
Among counties within 50 miles, Morgan County leans more Republican than 1 of 12 neighbors.
Morgan County runs about 36 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Morgan County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Morgan County. The southeast side is the most Republican-leaning (R+51) and the west side is the least Republican-leaning (R+14), a spread of about 37 points.
Why Morgan 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 Morgan County, not a ranked or complete list of what matters most.
Morgan County votes Republican even though it is densely developed (about 54%, well above the Illinois average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Morgan County runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Housing overcrowding and voter turnout
Places with low overcrowding tend to turn out at a higher rate; Morgan County, IL sits in the bottom tenth nationally on this measure.
Why turnout in Morgan County looks the way it does
Turnout in Morgan 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
- Scott County, IL R+64
- Cass County, IL R+31
- Greene County, IL R+56
- Menard County, IL R+41
- Sangamon County, IL Even
- Brown County, IL R+39
- Schuyler County, IL R+44
- Pike County, IL R+57
- Macoupin County, IL R+42
- Mason County, IL R+46
Counties with Similar Populations
- Jasper County, IN R+50
- Weakley County, TN R+53
- Rhea County, TN R+63
- Jefferson County, WA D+45
- Greenbrier County, WV R+47
- Jasper County, TX R+54
- Lafayette County, MO R+51
- Transylvania County, NC R+17
- Pike County, AL R+17
- Gibson County, IN R+49
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Illinois State Board of 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.