Dahlgren is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 77% of adults in Dahlgren typically vote, above the U.S. average of about 62%. Among adults in Dahlgren, ~12% vote Democratic, ~65% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How Dahlgren compares
Among cities within 25 miles, Dahlgren leans more Republican than 50 of 66 neighbors.
Dahlgren runs about 80 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Dahlgren is one of the few Republican-leaning pockets.
Why Dahlgren 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 Dahlgren, not a ranked or complete list of what matters most.
Dahlgren votes against the grain of Illinois. Illinois leans Democratic overall, while Dahlgren runs about 80 points more Republican. A high white share with below-average college attainment predicts Republican voting, and Dahlgren fits that profile on both counts. A high family-household share predicts Republican voting, and about 77% of households in Dahlgren are family households, above 83% of cities.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Dahlgren, IL sits below the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Dahlgren looks the way it does
Turnout in Dahlgren sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Piopolis, IL R+68
- Delafield, IL R+68
- Belle Rive, IL R+69
- Keenes, IL R+71
- Frisco, IL R+68
- Wayne City, IL R+65
- Diamond City, IL R+62
- McLeansboro, IL R+57
- Opdyke, IL R+67
- Bluford, IL R+68
Cities with Similar Populations
- Phillips, ME R+36
- Sligo, NC R+51
- West Buechel, KY D+38
- Kirklin, IN R+58
- Riceville, IA R+48
- Hinsdale, NY R+44
- Westmoreland, KS R+55
- Campbelltown, PA R+18
- Lake Lindsey, FL R+61
- Surry, ME D+15
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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.