Severn leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 74% of adults in Severn typically vote, above the U.S. average of about 62%. Among adults in Severn, ~50% vote Democratic, ~24% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Severn compares
Among cities within 25 miles, Severn leans more Democratic than 82 of 195 neighbors.
Severn runs about 5 points more Democratic than Maryland as a whole.
Politics vary noticeably by neighborhood within Severn. The southwest side is the most Democratic-leaning (D+66) and the southeast side is the least Democratic-leaning (D+3), a spread of about 63 points.
Why Severn 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 Severn, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 80% of residents in Severn live in densely developed areas, about 44 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Severn sits in the top quarter (about 41%, above 88% of cities). A high never-married share predicts Democratic voting, and about 34% of adults in Severn have never been married, above 85% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Severn, MD sits in the top quarter 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 Severn looks the way it does
Turnout in Severn sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Harmans, MD D+40
- Hanover, MD D+38
- Fort Meade, MD D+40
- Odenton, MD D+36
- Millersville, MD D+13
- Annapolis Junction, MD D+44
- Glen Burnie, MD D+17
- Jessup, MD D+48
- Elkridge, MD D+45
- Ferndale, MD D+10
Cities with Similar Populations
- Gahanna, OH D+21
- Saratoga Springs, NY D+23
- Rock Island, IL D+29
- Greenfield, WI D+6
- Parkland, WA D+16
- Jamestown, NY R+7
- East Hill-Meridian, WA D+24
- Merrillville, IN D+47
- Sahuarita, AZ R+7
- Adrian, MI R+13
Sources and methodology
Precinct-level voting records used to fit the model come from Maryland State Board 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.