Jerome is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 66% of adults in Jerome typically vote, near the U.S. average of about 62%. Among adults in Jerome, ~14% vote Democratic, ~52% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Jerome compares
Among cities within 25 miles, Jerome leans more Republican than 21 of 42 neighbors.
Jerome runs about 44 points more Republican than Iowa as a whole.
Why Jerome 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 Jerome, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Jerome, about 95% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%; about 16% of adults hold a bachelor's degree, about 8 points below the Iowa average of 24%. Rural areas vote Republican, and Jerome sits in the bottom quarter on density (about 5%, below 81% of cities). A high family-household share predicts Republican voting, and about 84% of households in Jerome are family households, above 95% of cities.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as Jerome, IA does.
Why turnout in Jerome looks the way it does
Turnout in Jerome 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 Cities
- Numa, IA R+58
- Seymour, IA R+59
- Garfield, IA R+50
- Plano, IA R+52
- Cincinnati, IA R+58
- Sunshine, IA R+53
- Mystic, IA R+51
- Centerville, IA R+34
- Promise City, IA R+58
Cities with Similar Populations
- South Lynchburg, SC D+49
- Fayette, MI R+26
- Jacksons Crossroads, GA R+33
- Upper Mongaup, NY R+11
- Bairdstown, OH R+49
- Moscow, KY R+65
- Jenifer, AL R+44
- Quaker Hill, NY R+3
- Kapowsin, WA R+33
- Twin Branch, WV R+70
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Sources and methodology
Precinct-level voting records used to fit the model come from Iowa Secretary of State, 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.