Manassas City leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 66% of adults in Manassas City typically vote, near the U.S. average of about 62%. Among adults in Manassas City, ~38% vote Democratic, ~28% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Manassas City compares
Among counties within 50 miles, Manassas City leans more Democratic than 14 of 28 neighbors.
Manassas City runs about 9 points more Democratic than Virginia as a whole.
Politics vary noticeably by city within Manassas City. The south side is the most Democratic-leaning (D+19) and the northeast side is the least Democratic-leaning (D+9), a spread of about 10 points.
Why Manassas City 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 Manassas City, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 99% of residents in Manassas City live in densely developed areas, about 62 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Manassas City sits in the top quarter (about 31%, above 79% of counties). A high never-married share predicts Democratic voting, and about 34% of adults in Manassas City have never been married, above 82% of counties.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Manassas City, VA 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 Manassas City looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Manassas City 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 65%, about 5 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Manassas Park City, VA D+19
- Prince William County, VA D+21
- Fairfax City, VA D+25
- Fairfax County, VA D+37
- Fauquier County, VA R+19
- Falls Church City, VA D+45
- Loudoun County, VA D+18
- Alexandria City, VA D+55
- Arlington County, VA D+57
- Stafford County, VA D+6
Counties with Similar Populations
- Franklin County, TN R+59
- Camden County, MO R+54
- Fulton County, OH R+45
- Davie County, NC R+45
- Stephens County, OK R+58
- Polk County, GA R+53
- Union County, PA R+26
- Montrose County, CO R+30
- Levy County, FL R+56
- Douglas County, WA R+25
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.