Union
Incorporated 1786Earlier known as Taylortown and Sterlingtown. No source found explaining the choice of the name Union.
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoUnion’s vote. Click a question for the statewide comparison.How Union Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Union 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 2020–2024Union at a Glance
Union is a town in Knox County, Maine, incorporated in 1786. It has an estimated 2,444 residents (2025), compared with 2,383 in the 2020 Census.
It is part of Congressional District 1, State Senate District 12, State House District 44, and County Commissioner District 2, in the Midcoast region.
In the 2024 presidential race, Donald Trump carried Union with 52.1% to 46% for Kamala Harris. That was a Republican margin of 6.1 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Paul LePage carried Union with 50.1% to 47.7% for Janet Mills. In the 2024 U.S. Senate race, Angus King (Unenrolled) carried Union with 49.3% to 41.7% for Demi Kouzounas. On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the 316th most Republican of 504 towns.
As of March 7, 2026, Union had 1,786 active registered voters: 25.4% Democrats, 38.7% Republicans, 31.2% unenrolled, and 4.5% Green Independents. The median household income is $80,724 and the median home value $267,600, 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.