State Line is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 75% of adults in State Line typically vote, above the U.S. average of about 62%. Among adults in State Line, ~13% vote Democratic, ~62% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How State Line compares
Among cities within 25 miles, State Line leans more Republican than 40 of 44 neighbors.
State Line runs about 28 points more Republican than Idaho as a whole.
Why State Line 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 State Line, not a ranked or complete list of what matters most.
State Line votes Republican even though it is densely developed (about 30%, modestly above the Idaho average of 18%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 77% of households in State Line are family households, above 83% of cities.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; State Line, ID 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 State Line looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in State Line have completed high school, about 5 points above the Idaho average of 91%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Newman Lake, WA R+35
- Post Falls, ID R+55
- McGuire, ID R+61
- Hauser, ID R+61
- Liberty Lake, WA R+15
- Otis Orchards, WA R+34
- Huetter, ID R+44
- Greenacres, WA R+22
- Veradale, WA R+18
- Coeur d'Alene, ID R+31
Cities with Similar Populations
- Vento, KY R+67
- Kelsey, CA R+23
- Rockhouse, AR R+60
- Cheneyville, LA Even
- Pipersville, WI R+35
- Silver Beach Heights, FL R+59
- Terlingua, TX R+34
- South Hingham, MA D+21
- Okauchee, WI R+17
- Burt Lake, MI R+17
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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.