Grant County leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 60% of adults in Grant County typically vote, near the U.S. average of about 62%. Among adults in Grant County, ~20% vote Democratic, ~40% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How Grant County compares
Among counties within 50 miles, Grant County is the most Republican-leaning.
Grant County runs about 52 points more Republican than Washington as a whole. Washington leans Democratic overall, while Grant County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Grant County. The north side is the most Republican-leaning (R+46) and the southwest side is the least Republican-leaning (R+25), a spread of about 21 points.
Why Grant County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Grant County, not a ranked or complete list of what matters most.
Grant County votes against the grain of Washington. Washington leans Democratic overall, while Grant County runs about 52 points more Republican. A high family-household share predicts Republican voting, and about 72% of households in Grant County are family households, above 86% of counties.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; Grant County, WA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Grant County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Grant County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 35% of households in Grant County rent, above 86% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Adams County, WA R+31
- Douglas County, WA R+25
- Chelan County, WA R+12
- Kittitas County, WA R+8
- Franklin County, WA R+16
- Yakima County, WA R+6
- Lincoln County, WA R+54
- Benton County, WA R+21
- Walla Walla County, WA R+7
- Okanogan County, WA R+16
Counties with Similar Populations
- Dubuque County, IA R+12
- Madison County, TN R+2
- Lenawee County, MI R+27
- Cleveland County, NC R+33
- Sutter County, CA R+23
- Floyd County, GA R+37
- Dallas County, IA R+7
- Story County, IA D+14
- Montgomery County, VA D+10
- Moore County, NC R+24
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.