84321 leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 60% of adults in 84321 typically vote, near the U.S. average of about 62%. Among adults in 84321, ~25% vote Democratic, ~35% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 84321 compares
Among zip codes within 15 miles, 84321 leans more Republican than 1 of 16 neighbors.
84321 runs about 6 points more Democratic than Utah as a whole.
Politics vary noticeably by block within 84321. The southeast side is the most split-leaning (R+54) and the northeast side is the least split-leaning (R+2), a spread of about 51 points.
Why 84321 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 84321, not a ranked or complete list of what matters most.
84321 votes Republican even though it is densely developed (about 79%, far above the Utah average of 32%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Homeownership and voter turnout
Places with renter-heavy households tend to turn out at a lower rate; 84321, UT sits in the bottom tenth nationally on this measure.
Why turnout in 84321 looks the way it does
Renters vote less often than owners. About 50% of households in 84321 rent, about 25 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 5% of homes in 84321 have more than one occupant per room, above 86% 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.