84066 is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 63% of adults in 84066 typically vote, near the U.S. average of about 62%. Among adults in 84066, ~9% vote Democratic, ~54% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How 84066 compares
Among zip codes within 15 miles, 84066 leans more Republican than 4 of 9 neighbors.
84066 runs about 50 points more Republican than Utah as a whole.
Politics vary noticeably by block within 84066. The southwest side is the most Republican-leaning (R+88) and the northeast side is the least Republican-leaning (R+51), a spread of about 38 points.
Why 84066 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 84066, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 79% of households in 84066 are family households, about 12 points above the U.S. average of 67%.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 84066, UT sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 84066 looks the way it does
Turnout in 84066 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.