South Deer Isle is a true toss-up. About 50% of voters here vote Democratic and 50% Republican. These figures are model estimates: Maine did not have precinct-level voting records available for training, so the numbers above come from demographic and health features rather than local ground truth.
About 97% of adults in South Deer Isle typically vote, above the U.S. average of about 62%. Among adults in South Deer Isle, ~48% vote Democratic, ~49% Republican, and ~3% don't vote. The map below shows estimated turnout by block group.
How South Deer Isle compares
Among cities within 25 miles, South Deer Isle sits roughly in the middle of the political spectrum, with 3 neighbors leaning further in the place's direction and 50 leaning the other way.
South Deer Isle runs about 7 points more Republican than Maine as a whole.
Why South Deer Isle leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in South Deer Isle. None of them point strongly toward either party.
Park access and Democratic lean
Places with heavy park coverage tend to lean Democratic; South Deer Isle, ME sits above the national average on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in South Deer Isle looks the way it does
Areas with strong routine healthcare access turn out at higher rates. South Deer Isle 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 64%, above 62% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Stonington, ME Even
- West Stonington, ME Even
- Deer Isle, ME D+3
- Sunset, ME Even
- Isle Au Haut, ME D+29
- Naskeag, ME D+19
- Little Deer Isle, ME D+7
- Pulpit Harbor, ME D+24
- Brooklin, ME D+17
- Swans Island, ME D+19
Cities with Similar Populations
- London, MN R+41
- Wende, AL D+35
- Wendell, NH D+4
- Cow Yard, MA D+8
- Stirum, ND R+56
- Gaars Mill, LA R+84
- White Rock, NM D+11
- Wheeler, WV R+67
- Kaltag, AK D+35
- Cub Lake, MS R+34
Sources and methodology
Precinct-level voting records used to fit the model come from Maine Secretary of State, Bureau of Corporations Elections and Commissions, 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. ME did not have precinct-level voting records available for training, so the figures here come from extrapolation across demographic, health, and land-use features rather than local ground truth. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.