Herndon leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 80% of adults in Herndon typically vote, above the U.S. average of about 62%. Among adults in Herndon, ~23% vote Democratic, ~57% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Herndon compares
Among cities within 25 miles, Herndon leans more Republican than 18 of 31 neighbors.
Herndon runs about 40 points more Republican than Georgia as a whole.
Politics vary noticeably by neighborhood within Herndon. The north side runs the most Democratic (D+11) and the southeast side runs the most Republican (R+61), a spread of about 71 points.
Why Herndon 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 Herndon, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 88% of residents in Herndon drive to work alone, about 14 points above the U.S. average of 74%.
Population density and Republican lean
Places with low population density tend to lean Republican; Herndon, GA sits in the bottom quarter nationally on this measure.
Why turnout in Herndon looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Herndon 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
- Midville, GA R+6
- Thrift, GA R+37
- Summertown, GA R+21
- Emmalane, GA R+47
- Modoc, GA R+49
- Butts, GA R+37
- Blundale, GA R+6
- Rosier, GA D+8
- Wadley, GA D+44
Cities with Similar Populations
- Agate, CO R+58
- North Buckfield, ME R+38
- Harrisville, OH R+61
- Toco, TX R+69
- Halfway, TX R+79
- Tin City, NC R+11
- Rexville, IN R+66
- Howlett Hill, NY R+5
- Vanna, GA R+72
- Rimforest, CA R+18
Sources and methodology
Precinct-level voting records used to fit the model come from Georgia 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.