Southwest Harbor
Incorporated 1905Named for its position at the southwest entrance to Somes Sound, across from Northeast Harbor. It split from Tremont in 1905.
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoSouthwest Harbor’s vote. Click a question for the statewide comparison.How Southwest Harbor Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Southwest Harbor 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 2020–2024Southwest Harbor at a Glance
Southwest Harbor is a town in Hancock County, Maine, incorporated in 1905. It has an estimated 1,873 residents (2025), compared with 1,756 in the 2020 Census.
It is part of Congressional District 2, State Senate District 7, State House District 15, and County Commissioner District 3, in the Acadia Region.
In the 2024 presidential race, Kamala Harris carried Southwest Harbor with 65.1% to 33.1% for Donald Trump. That was a Democratic margin of 32 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Janet Mills carried Southwest Harbor with 64.9% to 33% for Paul LePage. In the 2024 U.S. Senate race, Angus King (Unenrolled) carried Southwest Harbor with 60.6% to 23.6% for Demi Kouzounas. On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the 41st most Democratic of 504 towns.
As of March 7, 2026, Southwest Harbor had 1,264 active registered voters: 45.5% Democrats, 23% Republicans, 28.9% unenrolled, and 2.5% Green Independents. The median household income is $59,205 and the median home value $428,500, against $74,733 and $296,600 statewide.
Below the summary figures, this page has election results back to 1906 (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.