Annawan leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 93% of adults in Annawan typically vote, above the U.S. average of about 62%. Among adults in Annawan, ~30% vote Democratic, ~63% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How Annawan compares
Among cities within 25 miles, Annawan leans more Republican than 22 of 52 neighbors.
Annawan runs about 48 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Annawan is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Annawan. The west side is the most Republican-leaning (R+50) and the east side is the least Republican-leaning (R+35), a spread of about 16 points.
Why Annawan 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 Annawan, not a ranked or complete list of what matters most.
Annawan votes against the grain of Illinois. Illinois leans Democratic overall, while Annawan runs about 48 points more Republican. Car-dependent areas vote Republican, and about 86% of residents in Annawan drive to work alone, above 85% of cities.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Annawan, IL sits in the top tenth nationally on this measure.
Why turnout in Annawan looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in Annawan 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
- Mineral, IL R+43
- Atkinson, IL R+34
- Thomas, IL R+47
- Hooppole, IL R+45
- Neponset, IL R+43
- Sheffield, IL R+34
- Osceola, IL R+43
- Kewanee, IL R+14
- Yorktown, IL R+46
- New Bedford, IL R+46
Cities with Similar Populations
- Cassville, WV R+28
- Sibley, MO R+55
- Gem Village, CO R+26
- Newaukum, WA R+26
- Todds Tavern, VA R+31
- Townshend, VT D+24
- Thornton, TX R+78
- Cottonwood Falls, KS R+40
- Lingleville, TX R+72
- Thornville, MI R+37
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.