Calder leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 51% of adults in Calder typically vote, below the U.S. average of about 62%. Among adults in Calder, ~15% vote Democratic, ~36% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How Calder compares
Among cities within 25 miles, Calder leans more Republican than 3 of 21 neighbors.
Calder runs about 5 points more Republican than Idaho as a whole.
Why Calder 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 Calder, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 1% of residents in Calder live in densely developed areas, about 17 points below the Idaho average of 18%. A high family-household share predicts Republican voting, and about 82% of households in Calder are family households, above 93% of cities.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Calder, ID sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Calder looks the way it does
High-crime urban areas turn out at lower rates, mostly because the housing stress common in those areas makes voting harder. Calder sits in the top 15% nationally on a violent-crime measure. See CrimeGrade for more details. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- St. Joe, ID R+63
- Santa, ID R+69
- Wardner, ID R+34
- Osburn, ID R+40
- Silverton, ID R+46
- Fernwood, ID R+67
- Wallace, ID R+46
- Pinehurst, ID R+45
- Kellogg, ID R+37
Cities with Similar Populations
- Landgraff, WV R+30
- Fowlerton, TX R+51
- Robb, PA R+51
- Sharon Center, PA R+63
- Fort Seybert, WV R+63
- Platten, NY R+45
- Dean, LA R+82
- Fox Hill, IN R+50
- Davisville, AL D+76
- Mc Bride, MO R+69
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.