Sun City leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 42% of adults in Sun City typically vote, below the U.S. average of about 62%. Among adults in Sun City, ~18% vote Democratic, ~24% Republican, and ~58% 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 28 of 50 neighbors.
Sun City runs about 35 points more Republican than California as a whole. California leans Democratic overall, while Sun City is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Sun City. The northeast side is the most Republican-leaning (R+24) and the northwest side is the least Republican-leaning (R+7), a spread of about 16 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 31%, well below the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 86% of households in Sun City are family households, above 97% of cities. Sun City runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Sun City, CA sits in the bottom quarter nationally 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 limited routine healthcare access turn out at lower rates. Sun City is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 27% of adults in Sun City report food insecurity, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Homeland, CA R+18
- Menifee, CA R+14
- Nuevo, CA R+22
- Juniper Springs, CA R+34
- Perris, CA D+14
- Good Hope, CA D+4
- Canyon Lake, CA R+24
- Winchester, CA R+22
- Meadowbrook, CA R+11
Cities with Similar Populations
- Commercial Point, OH R+41
- Helena Valley Northeast, MT R+37
- Lake Crystal, MN R+23
- South Vienna, OH R+55
- Hawthorne, NV R+47
- Cana, VA R+66
- Walters, OK R+63
- Enfield, NH D+6
- Graysville, TN R+66
- New Hill, NC D+4
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Sources and methodology
Precinct-level voting records used to fit the model come from California 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.