Ogle County leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 77% of adults in Ogle County typically vote, above the U.S. average of about 62%. Among adults in Ogle County, ~28% vote Democratic, ~50% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Ogle County compares
Among counties within 50 miles, Ogle County leans more Republican than 11 of 12 neighbors.
Ogle County runs about 39 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Ogle County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Ogle County. The northwest side is the most Republican-leaning (R+43) and the southeast side is the least Republican-leaning (R+18), a spread of about 25 points.
Why Ogle 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 Ogle County, not a ranked or complete list of what matters most.
Ogle County votes against the grain of Illinois. Illinois leans Democratic overall, while Ogle County runs about 39 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Ogle County, IL sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Ogle County looks the way it does
Turnout in Ogle 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
- Lee County, IL R+21
- Winnebago County, IL D+7
- Boone County, IL R+15
- DeKalb County, IL D+3
- Stephenson County, IL R+14
- Whiteside County, IL R+20
- Carroll County, IL R+34
- Rock County, WI Even
- Bureau County, IL R+27
- Green County, WI R+11
Counties with Similar Populations
- Oktibbeha County, MS D+3
- St. Martin Parish, LA R+35
- Waupaca County, WI R+34
- Harrisonburg City, VA D+18
- Darke County, OH R+61
- Grant County, WI R+23
- Nye County, NV R+41
- Cass County, MI R+29
- Franklin County, KY R+19
- Hoke County, NC D+7
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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.