84003 leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 86% of adults in 84003 typically vote, above the U.S. average of about 62%. Among adults in 84003, ~26% vote Democratic, ~60% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 84003 compares
Among zip codes within 15 miles, 84003 leans more Republican than 18 of 22 neighbors.
84003 runs about 19 points more Republican than Utah as a whole.
Politics vary noticeably by block within 84003. The north side is the most Republican-leaning (R+51) and the southeast side is the least Republican-leaning (R+28), a spread of about 23 points.
Why 84003 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 84003, not a ranked or complete list of what matters most.
84003 votes Republican even though it is densely developed (about 89%, far 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 84% of households in 84003 are family households, above 97% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 84003, UT sits in the top quarter 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 84003 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 84003 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 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in 84003 have completed high school, above 82% 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.