Kennebec County
Established 1799Named for the Kennebec River; the word comes from Abenaki, roughly "large body of still water."
Voter Registration
Active voters, Secretary of State file of March 7, 2026Current enrollment
Registration history
Recent General Election Results
Referendums
YesNoKennebec County’s vote. Click a question for the statewide comparison.How Kennebec County Compares
Presidential margin vs. Maine
Democratic minus Republican share of the candidate vote. The gap between the lines shows how differently Kennebec 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 2020–2024Kennebec County at a Glance
Kennebec County is one of Maine’s sixteen counties, established in 1799. It has an estimated 129,067 residents (2025), compared with 123,642 in the 2020 Census.
In the 2024 presidential race, Donald Trump carried Kennebec County with 50.2% to 47.5% for Kamala Harris. That was a Republican margin of 2.7 points, against a Democratic margin of 6.9 points statewide. In the 2022 governor’s race, Janet Mills carried Kennebec County with 51.1% to 47% for Paul LePage. In the 2024 U.S. Senate race, Angus King (Unenrolled) carried Kennebec County with 50.7% to 37.9% for Demi Kouzounas. On the Partisan Electoral Alignment Index (Partisan EAI), it ranks as the 8th most Democratic of 16 counties.
As of March 7, 2026, Kennebec County had 78,802 active registered voters: 30.3% Democrats, 34.5% Republicans, 30.8% unenrolled, and 3.8% Green Independents. The median household income is $69,077 and the median home value $238,200, 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.