Cumberland County
Established 1760Named for William, Duke of Cumberland, a son of King George II. It was formed from part of York County.
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoCumberland County’s vote. Click a question for the statewide comparison.How Cumberland County Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Cumberland County 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 2020–2024Cumberland County at a Glance
Cumberland County is one of Maine’s sixteen counties, established in 1760. It has an estimated 317,222 residents (2025), compared with 303,069 in the 2020 Census.
In the 2024 presidential race, Kamala Harris carried Cumberland County with 66.4% to 31.1% for Donald Trump. That was a Democratic margin of 35.3 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Janet Mills carried Cumberland County with 69.3% to 29.2% for Paul LePage. In the 2024 U.S. Senate race, Angus King (Unenrolled) carried Cumberland County with 59.6% to 24.8% for Demi Kouzounas. On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the most Democratic of 16 counties.
As of March 7, 2026, Cumberland County had 210,754 active registered voters: 45% Democrats, 21.5% Republicans, 30% unenrolled, and 3% Green Independents. The median household income is $95,677 and the median home value $451,200, against $74,733 and $296,600 statewide.
Below the summary figures, this page has election results back to 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.