Collister leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 78% of adults in Collister typically vote, above the U.S. average of about 62%. Among adults in Collister, ~47% vote Democratic, ~31% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Collister compares
Among neighborhoods within 5 miles, Collister leans more Democratic than 7 of 13 neighbors.
Collister runs about 57 points more Democratic than Idaho as a whole. Idaho leans Republican overall, while Collister is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within Collister. The south side is the most Democratic-leaning (D+24) and the north side is the least Democratic-leaning (D+11), a spread of about 13 points.
Why Collister leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for Collister, not a ranked or complete list of what matters most.
Collister votes against the grain of Idaho. Idaho leans Republican overall, while Collister runs about 57 points more Democratic.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Collister, Boise, ID sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Collister looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Collister 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 72%, about 12 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Sunset, Boise, ID D+44
- Veterans Park, Boise, ID D+29
- West Bench, Boise, ID D+4
- Northwest, Garden City, ID Even
- Winstead Park, Boise, ID D+20
- North End, Boise, ID D+57
- Highlands, Boise, ID D+20
- West Valley, Boise, ID Even
- Downtown, Boise, ID D+37
- Central Bench, Boise, ID D+21
Neighborhoods with Similar Populations
- West Bethlehem, Bethlehem, PA D+25
- Mid-Westside, Jacksonville, FL D+82
- Milwood, Kalamazoo, MI D+28
- West Newton, Newton, MA D+60
- Central Berkeley, Berkeley, CA D+84
- Oceanfront, Miami Beach, FL R+7
- Duluth Heights, Duluth, MN D+16
- Richmond Hill, Augusta, GA D+56
- Creston-Kenilworth, Portland, OR D+82
- Hillsdale, Portland, OR D+74
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.