85028 is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About 85% of adults in 85028 typically vote, above the U.S. average of about 62%. Among adults in 85028, ~43% vote Democratic, ~43% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 85028 compares
Among zip codes within 15 miles, 85028 sits roughly in the middle of the political spectrum, with 23 neighbors leaning further in the place's direction and 38 leaning the other way.
85028 runs about 6 points more Democratic than Arizona as a whole.
Why 85028 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 85028. The lean here lands roughly where demographic data alone would predict.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 85028, AZ sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 85028 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 85028 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 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 85028 have completed high school, above 89% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.