Newcastle
Incorporated 1753Named for the Duke of Newcastle, a British secretary of state seen as a friend of the colonies. The area was earlier Sheepscot Plantation.
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoNewcastle’s vote. Click a question for the statewide comparison.How Newcastle Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Newcastle 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 2020–2024Newcastle at a Glance
Newcastle is a town in Lincoln County, Maine, incorporated in 1753. It has an estimated 1,915 residents (2025), compared with 1,848 in the 2020 Census.
It is part of Congressional District 1, State Senate District 13, State House District 46, and County Commissioner District 3, in the Midcoast region.
In the 2024 presidential race, Kamala Harris carried Newcastle with 68.8% to 28.8% for Donald Trump. That was a Democratic margin of 40 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Janet Mills carried Newcastle with 70.5% to 28.3% for Paul LePage. In the 2024 U.S. Senate race, Angus King (Unenrolled) carried Newcastle with 62.4% to 23.5% for Demi Kouzounas. On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the 31st most Democratic of 504 towns.
As of March 7, 2026, Newcastle had 1,520 active registered voters: 45.7% Democrats, 22.2% Republicans, 27.7% unenrolled, and 4% Green Independents. The median household income is $89,868 and the median home value $398,000, 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.