Sunnyside is a true toss-up. About 52% of voters here vote Democratic and 48% Republican.
About 49% of adults in Sunnyside typically vote, below the U.S. average of about 62%. Among adults in Sunnyside, ~25% vote Democratic, ~23% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How Sunnyside compares
Among cities within 25 miles, Sunnyside leans more Democratic than 11 of 13 neighbors.
Sunnyside runs about 14 points more Republican than Washington as a whole.
Politics vary noticeably by neighborhood within Sunnyside. The north side runs the most Democratic (D+15) and the northeast side runs the most Republican (R+36), a spread of about 51 points.
Why Sunnyside leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Sunnyside. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Sunnyside, WA sits in the bottom tenth 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 limited routine healthcare access turn out at lower rates. Sunnyside is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 48%, about 17 points below the Washington average of 65%. Renters vote less often than owners, and about 42% of households in Sunnyside rent, about 17 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 59% of adults in Sunnyside have completed high school, in the bottom fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Outlook, WA R+28
- Grandview, WA Even
- Mabton, WA D+3
- Granger, WA D+2
- Zillah, WA R+31
- Prosser, WA R+28
- Toppenish, WA D+23
- Buena, WA R+12
- Whitstran, WA R+44
- Sawyer, WA R+11
Cities with Similar Populations
- Del City, OK D+6
- South Euclid, OH D+64
- Susanville, CA R+33
- Hatboro, PA D+5
- Ottawa, IL R+11
- Sartell, MN R+18
- Mooresville, IN R+47
- South Burlington, VT D+37
- Pleasant Prairie, WI R+7
- Merchantville, NJ D+32
Sources and methodology
Precinct-level voting records used to fit the model come from Washington 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.