Williamson leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 87% of adults in Williamson typically vote, above the U.S. average of about 62%. Among adults in Williamson, ~26% vote Democratic, ~61% Republican, and ~13% 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 7 of 17 neighbors.
Williamson runs about 34 points more Republican than Arizona as a whole.
Politics vary noticeably by neighborhood within Williamson. The south side is the most Republican-leaning (R+47) and the north side is the least Republican-leaning (R+31), a spread of about 16 points.
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 many family households vote Republican. About 76% of households in Williamson are family households, about 9 points above the U.S. average of 67%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Williamson, AZ sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Williamson looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Williamson is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 72%, about 12 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in Williamson own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 98% of adults in Williamson have completed high school, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Chino Valley, AZ R+42
- Prescott, AZ R+8
- Forbing Park, AZ R+22
- Del Rio, AZ R+34
- Miller Valley, AZ R+21
- Prescott Valley, AZ R+25
- Skull Valley, AZ R+66
- Paulden, AZ R+52
- Dewey, AZ R+33
Cities with Similar Populations
- Homer, NY R+16
- Orchard Homes, MT D+3
- Stanardsville, VA R+37
- Barboursville, VA R+14
- Palmer, TX R+49
- New Egypt, NJ R+40
- Fall City, WA D+23
- Bay Harbor Islands, FL R+15
- North Fond du Lac, WI R+19
- Staunton, IL R+35
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Sources and methodology
Precinct-level voting records used to fit the model come from Arizona 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.