85140 leans heavily Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 74% of adults in 85140 typically vote, above the U.S. average of about 62%. Among adults in 85140, ~26% vote Democratic, ~48% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 85140 compares
Among zip codes within 15 miles, 85140 is the most Republican-leaning.
85140 runs about 25 points more Republican than Arizona as a whole.
Politics vary noticeably by block within 85140. The northeast side is the most Republican-leaning (R+42) and the southwest side is the least Republican-leaning (R+20), a spread of about 21 points.
Why 85140 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 85140, not a ranked or complete list of what matters most.
85140 votes Republican even though it is densely developed (about 66%, well above the Arizona average of 39%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 82% of households in 85140 are family households, above 95% of zip codes.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 85140, AZ sits in the bottom tenth nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 85140 looks the way it does
Turnout in 85140 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.