Like the rest of Maine, Cumberland County was a solid Republican county after the
Civil War. Between
1860 and
1960, the Republican presidential nominee won Cumberland County in every election except
1912, when the county was won by Democrat
Woodrow Wilson following a split in the Republican vote between incumbent president
William Howard Taft and
Progressive nominee, the former Republican president
Theodore Roosevelt. The county remained steadfastly and overwhelmingly Republican even in
Franklin D. Roosevelt's huge Democratic landslide win in
1936. In
1964, Democrat
Lyndon B. Johnson won Cumberland County and Maine's 15 other counties as part of a 44-state landslide over controversial Republican nominee
Barry Goldwater. Cumberland remained in the Democratic column in
1968, backing
Hubert H. Humphrey, who had chosen Maine Senator
Edmund Muskie as his running mate. These Democratic victories were a sign of things to come for Cumberland County. Though it would snap back into the Republican column for
Richard Nixon in
1972, Republican victories in Cumberland grew increasingly narrower, with Republican
Gerald Ford winning it by less than 2,000 votes over Democrat
Jimmy Carter in
1976. Carter would narrowly win the county in
1980, marking the first time Cumberland had diverged from the rest of Maine in a presidential election, as the state would be carried by Republican nominee
Ronald Reagan. Reagan would easily carry Cumberland in his 49-state landslide re-election in
1984; however, it was Maine's closest county, with Democrat
Walter Mondale losing it by a relatively narrow 13.7%. In
1988,
George H. W. Bush would become the last Republican, as of 2024, to carry Cumberland County at the presidential level, winning it by less than seven points. In
1992, Democrat
Bill Clinton would win the county with nearly 43% of the vote against Bush and independent
Ross Perot; it would be the last time a Democrat would receive less than 50% of the vote in Cumberland County in a presidential election. In
2004, Cumberland would become the most Democratic county in Maine, a position it has retained through
2024. In
2008, over 105,000 ballots would be cast for the Democratic candidate,
Barack Obama; it would be the first time a candidate received 100,000 votes in Cumberland County in history. Democrats have exceeded 100,000 votes in Cumberland in each subsequent presidential election. In
2020, Democrat
Joe Biden won Cumberland County with 66% of the vote, the most lopsided presidential election result in the county since Lyndon Johnson won 69% of the vote in 1964. In
2012, the county voted 65% to legalize same-sex marriage.
Voter registration ==Communities==