85037 leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.
About 40% of adults in 85037 typically vote, below the U.S. average of about 62%. Among adults in 85037, ~25% vote Democratic, ~15% Republican, and ~60% don't vote. The map below shows estimated turnout by block group.
How 85037 compares
Among zip codes within 15 miles, 85037 leans more Democratic than 35 of 54 neighbors.
85037 runs about 31 points more Democratic than Arizona as a whole. Arizona leans Republican overall, while 85037 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 85037. The southeast side is the most Democratic-leaning (D+31) and the west side is the least Democratic-leaning (D+17), a spread of about 14 points.
Why 85037 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 85037, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 94% of residents in 85037 live in densely developed areas, about 58 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 42% of adults in 85037 have never been married, above 90% of zip codes. 85037 runs against the grain of Arizona, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 85037, AZ sits in the top quarter 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 85037 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 85037 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 24%, about 10 points above the Arizona average of 14%. Renters vote less often than owners, and about 41% of households in 85037 rent, about 16 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 26% of adults in 85037 report food insecurity, above 90% 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.