Mercer
Incorporated 1804Named for Revolutionary War Brig. Gen. Hugh Mercer. It was formed from Industry Plantation.
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoMercer’s vote. Click a question for the statewide comparison.How Mercer Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Mercer 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 2020–2024Mercer at a Glance
Mercer is a town in Somerset County, Maine, incorporated in 1804. It has an estimated 713 residents (2025), compared with 709 in the 2020 Census.
It is part of Congressional District 2, State Senate District 5, State House District 66, and County Commissioner District 2, in the Central Maine region.
In the 2024 presidential race, Donald Trump carried Mercer with 59.4% to 39.2% for Kamala Harris. That was a Republican margin of 20.2 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Paul LePage carried Mercer with 56.7% to 42.2% for Janet Mills. In the 2024 U.S. Senate race, Demi Kouzounas carried Mercer with 45% to 44.2% for Angus King (Unenrolled). On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the 230th most Republican of 504 towns.
As of March 7, 2026, Mercer had 531 active registered voters: 23.5% Democrats, 37.7% Republicans, 33.5% unenrolled, and 4.5% Green Independents. The median household income is $71,107 and the median home value $238,500, 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.