Williamson is a Republican stronghold. About 24% of voters here vote Democratic and 76% Republican.
About 82% of adults in Williamson typically vote, above the U.S. average of about 62%. Among adults in Williamson, ~20% vote Democratic, ~62% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Williamson compares
Among cities within 25 miles, Williamson leans more Republican than 37 of 44 neighbors.
Williamson runs about 39 points more Republican than Iowa as a whole.
Why Williamson 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 Williamson, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Williamson, about 97% of residents are non-Hispanic white, about 25 points above the U.S. average of 72%; about 18% of adults hold a bachelor's degree, about 7 points below the Iowa average of 24%. Rural areas vote Republican, and Williamson sits in the bottom quarter on density (about 5%, below 77% of cities). A high family-household share predicts Republican voting, and about 78% of households in Williamson are family households, above 84% of cities.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as Williamson, IA does.
Why turnout in Williamson looks the way it does
Homeowners vote more often than renters. About 95% of households in Williamson own their home, about 13 points above the Iowa average of 81%. High high-school completion lines up with higher turnout, and about 96% of adults in Williamson have completed high school, above 87% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Newbern, IA R+48
- Chariton, IA R+38
- Oakley, IA R+50
- Columbia, IA R+48
- Melcher, IA R+45
- Melcher-Dallas, IA R+39
- Russell, IA R+53
- Weller, IA R+48
- Lacona, IA R+46
- Dallas, IA R+45
Cities with Similar Populations
- Relfs Bluff, AR R+82
- Albion, OK R+72
- Point Clear, AL R+34
- Garbutt, NY R+17
- Magnolia, WI R+15
- Lawyersville, NY R+33
- Dennys Mill, PA R+43
- Ashland, SC R+38
- Herrickville, PA R+61
- Independents, SC R+18
All Local Stats
Home Services
Sources and methodology
Precinct-level voting records used to fit the model come from Iowa Secretary of State, 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.