Knowlton Heights leans heavily Republican by roughly 50 points: about 25% of voters vote Democratic and 75% Republican.
About 68% of adults in Knowlton Heights typically vote, above the U.S. average of about 62%. Among adults in Knowlton Heights, ~17% vote Democratic, ~51% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How Knowlton Heights compares
Among cities within 25 miles, Knowlton Heights leans more Republican than 9 of 26 neighbors.
Knowlton Heights runs about 13 points more Republican than Idaho as a whole.
Politics vary noticeably by neighborhood within Knowlton Heights. The east side is the most Republican-leaning (R+65) and the southeast side is the least Republican-leaning (R+44), a spread of about 21 points.
Why Knowlton Heights 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 Knowlton Heights, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 92% of residents in Knowlton Heights drive to work alone, about 18 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 92% of households in Knowlton Heights are family households, in the top fraction of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Knowlton Heights, ID 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 Knowlton Heights looks the way it does
Homeowners vote more often than renters. About 93% of households in Knowlton Heights own their home, about 13 points above the Idaho average of 79%. Limited routine healthcare access lines up with lower turnout, and Knowlton Heights sits in the bottom quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Sunnyslope, ID R+47
- Caldwell, ID R+37
- Middleton, ID R+60
- Nampa, ID R+36
- Star, ID R+48
- Greenleaf, ID R+65
- Notus, ID R+68
- Huston, ID R+67
- Marsing, ID R+64
- Meridian, ID R+25
Cities with Similar Populations
- North Pharsalia, NY R+50
- Riverside, NV R+63
- Pittsburgh Junction, OH R+60
- Niles, MS D+59
- Ino, VA R+43
- Scofield, UT R+51
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.