Sunnyside leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 99% of adults in Sunnyside typically vote, above the U.S. average of about 62%. Among adults in Sunnyside, ~29% vote Democratic, ~70% Republican, and ~1% don't vote. The map below shows estimated turnout by block group.
How Sunnyside compares
Among cities within 25 miles, Sunnyside leans more Republican than 7 of 28 neighbors.
Sunnyside runs about 5 points more Republican than Idaho as a whole.
Why Sunnyside 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 Sunnyside, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Sunnyside sits in the bottom quarter on density and about 97% of residents are non-Hispanic white, about 14 points above the Idaho average of 83%. A high family-household share predicts Republican voting, and about 87% of households in Sunnyside are family households, above 98% of cities.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Sunnyside, 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 Sunnyside looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Sunnyside 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 68%, about 8 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 91% of households in Sunnyside own their home, about 16 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Sunnyside have completed high school, above 89% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Westmond, ID R+46
- Culver, ID R+49
- East Hope, ID R+39
- Talache, ID R+43
- Kootenai, ID R+44
- Ponderay, ID R+38
- Hope, ID R+37
- Sandpoint, ID R+29
- Sagle, ID R+50
- Trestle Creek, ID R+48
Cities with Similar Populations
- Flat Creek, NY R+43
- Pocahontas, PA R+73
- Wing, IL R+55
- Stoneman Lake, AZ R+39
- Winterburne, PA R+56
- Wisner, MI R+46
- Dawes, WV R+57
- Short, OK R+70
- Deedsville, IN R+64
- McDowell, IL R+54
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.