Millsboro leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 80% of adults in Millsboro typically vote, above the U.S. average of about 62%. Among adults in Millsboro, ~35% vote Democratic, ~45% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Millsboro compares
Among cities within 25 miles, Millsboro leans more Republican than 22 of 68 neighbors.
Millsboro runs about 26 points more Republican than Delaware as a whole. Delaware leans Democratic overall, while Millsboro is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Millsboro. The south side runs the most Democratic (D+12) and the west side runs the most Republican (R+20), a spread of about 32 points.
Why Millsboro 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 Millsboro, not a ranked or complete list of what matters most.
Millsboro votes Republican even though it is densely developed (about 40%, above 84% of cities). Here an older population outweighs the Democratic lean that density usually predicts. Millsboro runs against the grain of Delaware, a Republican-leaning pocket in a Democratic-leaning state.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Millsboro, DE sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Millsboro looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Millsboro 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 62%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Riverdale, DE R+16
- Dagsboro, DE R+22
- Long Neck, DE R+20
- Phillips Hill, DE R+34
- Harbeson, DE R+11
- Cool Spring, DE R+9
- Mission, DE R+39
- Frankford, DE R+17
- Millville, DE R+7
- Georgetown, DE R+16
Cities with Similar Populations
- Centereach, NY R+19
- Batavia, IL D+15
- Rolla, MO R+22
- Richmond Hill, GA R+27
- Martinsville, IN R+52
- Madison Heights, MI D+9
- Ardmore, OK R+33
- Rosharon, TX D+15
- Carbondale, IL D+36
- Norco, CA R+19
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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.