Marion is a Republican stronghold. About 11% of voters here vote Democratic and 89% Republican.
About 49% of adults in Marion typically vote, below the U.S. average of about 62%. Among adults in Marion, ~5% vote Democratic, ~44% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How Marion compares
Among cities within 25 miles, Marion leans more Republican than 10 of 16 neighbors.
Marion runs about 41 points more Republican than Idaho as a whole.
Why Marion 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 Marion, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 87% of households in Marion are family households, about 21 points above the U.S. average of 67%. Rural areas vote Republican, and Marion sits in the bottom quarter on density (about 2%, below 96% of cities).
Population density and Republican lean
Places with low population density tend to lean Republican; Marion, ID sits in the bottom tenth nationally on this measure.
Why turnout in Marion looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Marion is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Crowded housing lines up with lower turnout, and about 7% of homes in Marion have more than one occupant per room, above 93% of cities. Low high-school completion lines up with lower turnout, and about 86% of adults in Marion have completed high school, below 76% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Oakley, ID R+78
- Pella, ID R+71
- View, ID R+75
- Elba, ID R+82
- Burley, ID R+54
- Unity, ID R+68
- Murtaugh, ID R+64
- Albion, ID R+81
- Connor, ID R+83
- Almo, ID R+84
Cities with Similar Populations
- Princeton, PA R+51
- Nogalus, TX R+78
- Roosevelt, AZ R+40
- Irwin, OH R+58
- Orleans, OR R+13
- Florence, VT R+15
- Lakeview, LA R+62
- Ridenour, TN R+71
- Black Creek, NY R+54
- Theressa, FL R+65
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Idaho 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.