Thomaston
Incorporated 1777Named for Maj. Gen. John Thomas of the Revolutionary War. It was formerly part of St. Georges Plantation.
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoThomaston’s vote. Click a question for the statewide comparison.How Thomaston Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Thomaston 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 2020–2024Thomaston at a Glance
Thomaston is a town in Knox County, Maine, incorporated in 1777. It has an estimated 2,751 residents (2025), compared with 2,739 in the 2020 Census.
It is part of Congressional District 1, State Senate District 12, State House District 43, and County Commissioner District 1, in the Midcoast region.
In the 2024 presidential race, Kamala Harris carried Thomaston with 56.8% to 41.4% for Donald Trump. That was a Democratic margin of 15.4 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Janet Mills carried Thomaston with 60.6% to 37.4% for Paul LePage. In the 2024 U.S. Senate race, Angus King (Unenrolled) carried Thomaston with 55% to 31.9% for Demi Kouzounas. On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the 72nd most Democratic of 504 towns.
As of March 7, 2026, Thomaston had 1,851 active registered voters: 37.5% Democrats, 27.6% Republicans, 30.3% unenrolled, and 4.1% Green Independents. The median household income is $56,435 and the median home value $271,700, against $74,733 and $296,600 statewide.
Below the summary figures, this page has election results back to 1868 (with county figures from 1860), 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.