19901 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 63% of adults in 19901 typically vote, near the U.S. average of about 62%. Among adults in 19901, ~39% vote Democratic, ~24% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How 19901 compares
Among zip codes within 15 miles, 19901 is the most Democratic-leaning.
19901 runs about 10 points more Democratic than Delaware as a whole.
Politics vary noticeably by block within 19901. The north side is the most Democratic-leaning (D+41) and the southwest side is the least Democratic-leaning (D+6), a spread of about 35 points.
Why 19901 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 19901, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 39% of adults in 19901 have never been married, about 9 points above the U.S. average of 29%.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 19901, DE 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 19901 looks the way it does
Turnout in 19901 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 Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Delaware 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.