Dulles leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 81% of adults in Dulles typically vote, above the U.S. average of about 62%. Among adults in Dulles, ~36% vote Democratic, ~45% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How Dulles compares
Among cities within 25 miles, Dulles leans more Republican than 84 of 119 neighbors.
Dulles runs about 17 points more Republican than Virginia as a whole. Virginia leans Democratic overall, while Dulles is one of the few Republican-leaning pockets.
Why Dulles 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 Dulles, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 87% of households in Dulles are family households, about 21 points above the U.S. average of 67%. Dulles runs against the grain of Virginia, a Republican-leaning pocket in a Democratic-leaning state.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Dulles, VA sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Dulles looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Dulles 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 77%, about 17 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 90% of households in Dulles own their home, above 81% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hamilton, VA R+2
- Mountville, VA Even
- Paeonian Springs, VA Even
- Leesburg, VA D+17
- Sycolin, VA D+6
- Purcellville, VA Even
- Waterford, VA R+5
- Airmont, VA Even
- Round Hill, VA R+7
Cities with Similar Populations
- Rowanta, VA R+31
- Gober, GA R+69
- Kecks Center, NY R+44
- Waters, MI R+37
- Columbia, IA R+48
- Macon, AL R+80
- Clearview, WV R+34
- Carmel Highlands, CA D+47
- Rickreall, OR R+29
- Brinktown, MO R+70
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Virginia Department of 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.