Hermiston leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 64% of adults in Hermiston typically vote, near the U.S. average of about 62%. Among adults in Hermiston, ~23% vote Democratic, ~41% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How Hermiston compares
Among cities within 25 miles, Hermiston leans more Republican than 2 of 12 neighbors.
Hermiston runs about 42 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while Hermiston is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Hermiston. The northeast side is the most Republican-leaning (R+39) and the west side is the least Republican-leaning (R+22), a spread of about 18 points.
Why Hermiston 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 Hermiston, not a ranked or complete list of what matters most.
Hermiston votes Republican even though it is densely developed (about 65%, far above the Oregon average of 31%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 78% of households in Hermiston are family households, above 86% of cities. Hermiston runs against the grain of Oregon, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Hermiston, OR sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Hermiston looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Hermiston is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Umatilla, OR R+38
- Stanfield, OR R+53
- Echo, OR R+64
- Plymouth, WA R+46
- Irrigon, OR R+41
- Wallula Junction, WA R+50
- Ruggs, OR R+60
- Boardman, OR R+20
- Pendair Heights, OR R+47
- Paterson, WA R+40
Cities with Similar Populations
- Fort Hood, TX R+3
- East Lake-Orient Park, FL D+35
- Muscatine, IA R+11
- Huntley, IL R+3
- Kirkwood, MO D+20
- Pacific Palisades, CA D+34
- Clinton, MS D+6
- North Attleboro, MA D+8
- Youngsville, LA R+57
- Elk River, MN R+19
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Oregon Secretary of State, Elections Division, 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.