85704 leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 73% of adults in 85704 typically vote, above the U.S. average of about 62%. Among adults in 85704, ~42% vote Democratic, ~31% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How 85704 compares
Among zip codes within 15 miles, 85704 leans more Democratic than 15 of 32 neighbors.
85704 runs about 21 points more Democratic than Arizona as a whole. Arizona leans Republican overall, while 85704 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 85704. The southeast side is the most Democratic-leaning (D+28) and the northwest side is the least Democratic-leaning (D+4), a spread of about 24 points.
Why 85704 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 85704, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 52% of adults in 85704 hold a bachelor's degree, about 24 points above the U.S. average of 28%. Dense areas vote Democratic, and 85704 sits in the top fifth on density (about 93%, above 90% of zip codes). 85704 runs against the grain of Arizona, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 85704, AZ sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 85704 looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in 85704 have completed high school, about 9 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.