85085 leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 72% of adults in 85085 typically vote, above the U.S. average of about 62%. Among adults in 85085, ~32% vote Democratic, ~40% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How 85085 compares
Among zip codes within 15 miles, 85085 leans more Republican than 20 of 33 neighbors.
85085 runs about 5 points more Republican than Arizona as a whole.
Politics vary noticeably by block within 85085. The northeast side is the most Republican-leaning (R+26) and the southwest side is the least Republican-leaning (R+3), a spread of about 23 points.
Why 85085 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 85085, not a ranked or complete list of what matters most.
85085 votes Republican even though it is densely developed (about 60%, well above the Arizona average of 39%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; 85085, AZ sits in the top tenth nationally on this measure.
Why turnout in 85085 looks the way it does
Areas with high high-school completion turn out at higher rates. About 98% of adults in 85085 have completed high school, about 11 points above the Arizona average of 87%. 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.