84005 leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 81% of adults in 84005 typically vote, above the U.S. average of about 62%. Among adults in 84005, ~21% vote Democratic, ~60% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How 84005 compares
Among zip codes within 15 miles, 84005 leans more Republican than 12 of 14 neighbors.
84005 runs about 26 points more Republican than Utah as a whole.
Politics vary noticeably by block within 84005. The northwest side is the most Republican-leaning (R+56) and the east side is the least Republican-leaning (R+41), a spread of about 16 points.
Why 84005 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 84005, not a ranked or complete list of what matters most.
84005 votes Republican even though it is densely developed (about 61%, well above the Utah average of 32%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 92% of households in 84005 are family households, in the top fraction of zip codes.
Adult arthritis and voter turnout
Places with a low adult-arthritis rate tend to turn out at a higher rate; 84005, UT sits in the bottom tenth nationally on this measure. Arthritis does not drive turnout; it reflects the age and health profile of an area.
Why turnout in 84005 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 84005 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 71%, about 11 points above the U.S. average of 60%. 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.