19939 leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 92% of adults in 19939 typically vote, above the U.S. average of about 62%. Among adults in 19939, ~35% vote Democratic, ~57% Republican, and ~8% don't vote. The map below shows estimated turnout by block group.
How 19939 compares
Among zip codes within 15 miles, 19939 leans more Republican than 14 of 18 neighbors.
19939 runs about 38 points more Republican than Delaware as a whole. Delaware leans Democratic overall, while 19939 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 19939. The north side is the most Republican-leaning (R+39) and the east side is the least Republican-leaning (R+17), a spread of about 22 points.
Why 19939 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 19939, not a ranked or complete list of what matters most.
19939 votes against the grain of Delaware. Delaware leans Democratic overall, while 19939 runs about 38 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 19939, DE sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 19939 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 19939 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%. Homeowners vote more often than renters, and about 90% of households in 19939 own their home, above 86% of zip codes. 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.