Cisco leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 82% of adults in Cisco typically vote, above the U.S. average of about 62%. Among adults in Cisco, ~24% vote Democratic, ~58% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Cisco compares
Among cities within 25 miles, Cisco leans more Republican than 21 of 63 neighbors.
Cisco runs about 53 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Cisco is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Cisco. The northwest side is the most Republican-leaning (R+53) and the east side is the least Republican-leaning (R+40), a spread of about 13 points.
Why Cisco leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Cisco, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 90% of residents in Cisco drive to work alone, about 16 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 76% of households in Cisco are family households, above 79% of cities. Cisco runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Population density and Republican lean
Places with low population density tend to lean Republican; Cisco, IL sits below the national average on this measure.
Why turnout in Cisco looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in Cisco have completed high school, about 5 points above the Illinois average of 92%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Newburg, IL R+51
- Milmine, IL R+45
- Monticello, IL R+27
- Argenta, IL R+45
- DeLand, IL R+43
- Weldon, IL R+57
- Cerro Gordo, IL R+41
- Bement, IL R+42
- Oakley, IL R+53
- Oreana, IL R+45
Cities with Similar Populations
- Portsville, DE R+52
- Peck, ID R+60
- Rappahannock Academy, VA R+15
- Neva Corners, WI R+50
- Crooked Oak, AL R+76
- Collettsville, NC R+63
- Conway, KY R+66
- Monroe, NH R+20
- Roxbury, VT Even
- Graceville, MN R+44
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.