Deer Isle
Incorporated 1789Named for the deer that were plentiful on the islands. The original town also took in Little Deer Isle and Isle au Haut.
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoDeer Isle’s vote. Click a question for the statewide comparison.How Deer Isle Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Deer Isle votes from the state.
Turnout in general elections
Ballots cast divided by active registered voters on election day. List maintenance shrinks the denominator in some years (for example 2022), which pushes the rate up.
Who Lives Here
American Community Survey 2020–2024Deer Isle at a Glance
Deer Isle is a town in Hancock County, Maine, incorporated in 1789. It has an estimated 2,132 residents (2025), compared with 2,194 in the 2020 Census.
It is part of Congressional District 2, State Senate District 7, State House District 15, and County Commissioner District 2, in the Acadia Region.
In the 2024 presidential race, Kamala Harris carried Deer Isle with 57.5% to 40.4% for Donald Trump. That was a Democratic margin of 17.1 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Janet Mills carried Deer Isle with 57.9% to 40.6% for Paul LePage. In the 2024 U.S. Senate race, Angus King (Unenrolled) carried Deer Isle with 62% to 26.3% for Demi Kouzounas. On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the 58th most Democratic of 504 towns.
As of March 7, 2026, Deer Isle had 1,465 active registered voters: 41.2% Democrats, 25.1% Republicans, 31.1% unenrolled, and 2.4% Green Independents. The median household income is $62,284 and the median home value $308,300, against $74,733 and $296,600 statewide.
Below the summary figures, this page has election results back to 1868 (with county figures from 1821), voter registration since 1954, referendum votes, turnout, and Census and American Community Survey figures. Sources are listed at the foot of the page and on the Data Sources page.