Union Gap leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 46% of adults in Union Gap typically vote, below the U.S. average of about 62%. Among adults in Union Gap, ~21% vote Democratic, ~25% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How Union Gap compares
Among cities within 25 miles, Union Gap leans more Republican than 7 of 18 neighbors.
Union Gap runs about 27 points more Republican than Washington as a whole. Washington leans Democratic overall, while Union Gap is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Union Gap. The southwest side is the most Republican-leaning (R+26) and the south side is the least Republican-leaning (R+4), a spread of about 22 points.
Why Union Gap 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 Union Gap, not a ranked or complete list of what matters most.
Union Gap votes Republican even though it is densely developed (about 80%, far above the Washington average of 41%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Low college attainment predicts Republican voting, and Union Gap sits in the bottom quarter (about 6%, below 98% of cities). Union Gap runs against the grain of Washington, a Republican-leaning pocket in a Democratic-leaning state.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; Union Gap, WA sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Union Gap looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Union Gap is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 21%, about 12 points above the Washington average of 9%. Renters vote less often than owners, and about 35% of households in Union Gap rent, above 91% of cities. Low high-school completion lines up with lower turnout, and about 70% of adults in Union Gap have completed high school, below 98% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Terrace Heights, WA R+23
- Yakima, WA R+4
- Parker, WA R+8
- Moxee, WA R+33
- Wapato, WA D+14
- Selah, WA R+36
- Gleed, WA R+41
- Sawyer, WA R+11
- Harrah, WA R+4
- Buena, WA R+12
Cities with Similar Populations
- Timnath, CO R+4
- Central Square, NY R+29
- Springfield, VT R+9
- Breckenridge, TX R+66
- Goshen, KY R+17
- Whitwell, TN R+70
- Oak Harbor, OH R+36
- Lake Lorraine, FL R+29
- Homestead Meadows South, TX D+8
- Hampden, ME R+4
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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.