Sun City leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 86% of adults in Sun City typically vote, above the U.S. average of about 62%. Among adults in Sun City, ~36% vote Democratic, ~50% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How Sun City compares
Among cities within 25 miles, Sun City leans more Republican than 18 of 27 neighbors.
Sun City runs about 11 points more Republican than Arizona as a whole.
Politics vary noticeably by neighborhood within Sun City. The northwest side is the most Republican-leaning (R+36) and the southeast side is the least Republican-leaning (R+5), a spread of about 31 points.
Why Sun City 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 Sun City, not a ranked or complete list of what matters most.
Sun City votes Republican even though it is densely developed (about 92%, far above the Arizona average of 39%). Here an older population outweighs the Democratic lean that density usually predicts.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Sun City, AZ sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Sun City looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Sun City 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 65%, about 5 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Peoria, AZ R+16
- El Mirage, AZ D+3
- Youngtown, AZ R+11
- Sun City West, AZ R+16
- Glendale, AZ D+3
- Surprise, AZ R+20
- Luke Afb, AZ R+3
- Litchfield Park, AZ R+9
- Waddell, AZ R+35
- Avondale, AZ D+16
Cities with Similar Populations
- Panorama City, CA D+23
- Southaven, MS R+7
- Crystal Lake, IL D+3
- Morristown, TN R+47
- Wheaton, MD D+48
- Ballwin, MO D+6
- Lakewood, OH D+45
- Irondequoit, NY D+23
- Wayne, NJ R+14
- La Mirada, CA D+10
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.