Silvis leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.
About 65% of adults in Silvis typically vote, near the U.S. average of about 62%. Among adults in Silvis, ~35% vote Democratic, ~30% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Silvis compares
Among cities within 25 miles, Silvis leans more Democratic than 69 of 73 neighbors.
Politically, Silvis sits close to the rest of Illinois.
Politics vary noticeably by neighborhood within Silvis. The west side is the most Democratic-leaning (D+15) and the southeast side is the least Democratic-leaning (Even), a spread of about 14 points.
Why Silvis 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 Silvis, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 90% of residents in Silvis live in densely developed areas, about 54 points above the U.S. average of 36%.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Silvis, IL sits in the top tenth nationally on this measure.
Why turnout in Silvis looks the way it does
Turnout in Silvis 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 Cities
- Carbon Cliff, IL Even
- East Moline, IL D+17
- Green Rock, IL R+21
- Barstow, IL R+22
- Hampton, IL Even
- Riverdale, IA R+6
- Moline, IL D+16
- Colona, IL R+23
- Coal Valley, IL R+18
- Cleveland, IL R+27
Cities with Similar Populations
- Satsuma, AL R+55
- Berryville, AR R+52
- Pea Ridge, AR R+54
- Colonial Beach, VA R+26
- Blairsville, PA R+38
- Wiggins, MS R+42
- Mills River, NC R+17
- Middleborough Center, MA Even
- Williamsburg, OH R+59
- Kincheloe, MI R+6
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.