84129 is a true toss-up. About 51% of voters here vote Democratic and 49% Republican.
About 64% of adults in 84129 typically vote, near the U.S. average of about 62%. Among adults in 84129, ~33% vote Democratic, ~31% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How 84129 compares
Among zip codes within 15 miles, 84129 sits roughly in the middle of the political spectrum, with 13 neighbors leaning further in the place's direction and 28 leaning the other way.
84129 runs about 23 points more Democratic than Utah as a whole. Utah leans Republican overall, while 84129 sits closer to the political middle.
Why 84129 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 84129, not a ranked or complete list of what matters most.
84129 votes against the grain of Utah. Utah leans Republican overall, while 84129 runs about 23 points more Democratic.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 84129, UT sits in the top tenth 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 84129 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 84129 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.