Island Park leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About more than 99% of adults in Island Park typically vote, above the U.S. average of about 62%. Among adults in Island Park, ~29% vote Democratic, ~81% Republican, and ~-10% don't vote. The map below shows estimated turnout by block group.
How Island Park compares
Island Park sits in a sparsely populated area with few comparable cities nearby.
Island Park runs about 12 points more Republican than Idaho as a whole.
Why Island Park 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 Island Park, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 2% of residents in Island Park live in densely developed areas, about 16 points below the Idaho average of 18%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Island Park, ID sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Island Park looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Island Park 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 75%, about 15 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 97% of households in Island Park own their home, about 22 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Island Park have completed high school, above 89% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Macks Inn, ID R+48
- West Yellowstone, MT D+6
- Warm River, ID R+62
- Marysville, ID R+65
- Ashton, ID R+66
- Drummond, ID R+67
- Lamont, ID R+67
- Chester, ID R+71
- Twin Groves, ID R+67
- Monida, MT R+61
Cities with Similar Populations
- Clarksburg, MO R+69
- Waterloo, OH R+68
- Blevins, AR R+53
- Nesika Beach, OR R+17
- Gouldsboro, ME R+20
- Selden, TX R+75
- Bowdon Junction, GA R+53
- Jimtown, KY R+50
- Oaks, OK R+56
- North Hero, VT R+6
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.