Grantsville is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 84% of adults in Grantsville typically vote, above the U.S. average of about 62%. Among adults in Grantsville, ~18% vote Democratic, ~66% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Grantsville compares
Among cities within 25 miles, Grantsville leans more Republican than 11 of 15 neighbors.
Grantsville runs about 36 points more Republican than Utah as a whole.
Politics vary noticeably by neighborhood within Grantsville. The south side is the most Republican-leaning (R+68) and the southwest side is the least Republican-leaning (R+54), a spread of about 14 points.
Why Grantsville leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Grantsville, not a ranked or complete list of what matters most.
Grantsville votes Republican even though it is densely developed (about 28%, about 9 points below the U.S. average of 36%). 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 Grantsville are family households, above 95% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Grantsville, 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 Grantsville looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Grantsville 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Tooele, UT R+40
- Stansbury Park, UT R+55
- Stockton, UT R+69
- Lincoln, UT R+53
- Lake Point, UT R+52
- Rush Valley, UT R+76
- Terra, UT R+63
- Ophir, UT R+72
- Copperton, UT R+33
Cities with Similar Populations
- Mulberry, FL R+33
- Foristell, MO R+41
- Lakeland, TN R+30
- Superior, CO D+51
- Coalinga, CA R+14
- Lake Station, IN R+12
- Ipswich, MA D+26
- Kingston, PA D+3
- West Carrollton, OH R+16
- Cortez, CO R+30
All Local Stats
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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.