85284 leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 81% of adults in 85284 typically vote, above the U.S. average of about 62%. Among adults in 85284, ~45% vote Democratic, ~37% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 85284 compares
Among zip codes within 15 miles, 85284 leans more Democratic than 20 of 48 neighbors.
85284 runs about 15 points more Democratic than Arizona as a whole. Arizona leans Republican overall, while 85284 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 85284. The southwest side is the most Democratic-leaning (D+17) and the north side is the least Democratic-leaning (D+3), a spread of about 14 points.
Why 85284 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 85284, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 70% of adults in 85284 hold a bachelor's degree, about 42 points above the U.S. average of 28%. Dense areas vote Democratic, and 85284 sits in the top fifth on density (more than 99%, above 97% of zip codes). 85284 runs against the grain of Arizona, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 85284, AZ sits in the top tenth 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 85284 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 85284 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in 85284 have completed high school, above 94% 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.