84115 leans heavily Democratic by roughly 46 points: about 73% of voters vote Democratic and 27% Republican.
About 43% of adults in 84115 typically vote, below the U.S. average of about 62%. Among adults in 84115, ~31% vote Democratic, ~12% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 84115 compares
Among zip codes within 15 miles, 84115 leans more Democratic than 37 of 42 neighbors.
84115 runs about 67 points more Democratic than Utah as a whole. Utah leans Republican overall, while 84115 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 84115. The northeast side is the most Democratic-leaning (D+64) and the southwest side is the least Democratic-leaning (D+30), a spread of about 33 points.
Why 84115 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 84115, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 84115 live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 45% of adults in 84115 have never been married, above 92% of zip codes. 84115 runs against the grain of Utah, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 84115, UT sits in the top tenth nationally on this measure.
Why turnout in 84115 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 84115 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 63% of households in 84115 rent, about 38 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 21% of adults in 84115 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 Utah Lieutenant Governor's Office, 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.