Fairfield is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 69% of adults in Fairfield typically vote, above the U.S. average of about 62%. Among adults in Fairfield, ~10% vote Democratic, ~59% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Fairfield compares
Among cities within 25 miles, Fairfield leans more Republican than 5 of 7 neighbors.
Fairfield runs about 36 points more Republican than Idaho as a whole.
Why Fairfield 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 Fairfield, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 1% of residents in Fairfield live in densely developed areas, about 17 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; Fairfield, ID sits in the top quarter 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 Fairfield looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Fairfield 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 69%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Soldier, ID R+72
- Selby, ID R+72
- Hill City, ID R+65
- Magic City, ID D+30
- Broadford, ID D+25
- Hailey, ID D+29
- Bellevue, ID D+13
- Gannett, ID R+28
- Gooding, ID R+51
Cities with Similar Populations
- Bon Wier, TX R+72
- Lesterville, SD R+56
- Magnolia, IL R+39
- Spalding, MO R+66
- Summit Corners, WI R+33
- Laporte, PA R+38
- St. Albans Bay, VT R+27
- Hope, ND R+30
- Jeff, KY R+66
- Silesia, MT R+64
All Local Stats
Home Services
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.