85339 leans heavily Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 61% of adults in 85339 typically vote, near the U.S. average of about 62%. Among adults in 85339, ~40% vote Democratic, ~21% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 85339 compares
Among zip codes within 15 miles, 85339 leans more Democratic than 27 of 45 neighbors.
85339 runs about 36 points more Democratic than Arizona as a whole. Arizona leans Republican overall, while 85339 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 85339. The southwest side is the most Democratic-leaning (D+64) and the southeast side is the least Democratic-leaning (D+15), a spread of about 49 points.
Why 85339 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 85339, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 75% of residents in 85339 live in densely developed areas, about 39 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 39% of adults in 85339 have never been married, above 86% of zip codes. 85339 runs against the grain of Arizona, a Democratic-leaning pocket in a Republican-leaning state.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 85339, AZ sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 85339 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 85339 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 22% of adults in 85339 report food insecurity, above 83% 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.