Bầu cử tổng thống Hoa Kỳ tại Maine năm 1964

The 1964 United States presidential election in Maine took place on November 3, 1964, as part of the 1964 United States presidential election, which was held throughout all fifty states and D.C. Voters chose four representatives, or electors to the Electoral College, who voted for president and vice president.

Maine was won by incumbent Democratic President Lyndon B. Johnson of Texas in a landslide over Republican U.S. Senator Barry Goldwater of Arizona. Johnson took 68.8% of the vote to Goldwater's 31.14%, a victory margin of 37.66 percentage points, and the strongest-ever performance by a Democrat in the state. Johnson became the first Democrat since Woodrow Wilson in 1912 to carry this longstanding liberal Republican stronghold, and the first since Franklin Pierce in 1852 to win the state with an outright majority. Even amidst a national Democratic landslide, Maine weighed-in in this election as more than 15 points to the left of the nation at-large.

Johnson carried Maine by a wide margin of 37.66%, making him the first Democratic candidate since Franklin Pierce in 1852 to win a majority (Wilson won the state in 1912 with only a plurality of 39.43%). Johnson was also the first Democrat to sweep all of Maine's counties.

He was the first Democrat to carry Somerset County since Martin Van Buren in 1836, the first since Pierce to carry the counties of Franklin, Oxford, Penobscot and Piscataquis and the first since Winfield S. Hancock in 1880 to carry Aroostook County. Populous Cumberland County, along with Lincoln County, had last voted Democratic for Woodrow Wilson in 1912, while the counties of Hancock, Knox and Waldo had last supported a Democrat when giving Wilson a plurality in 1916.

This would prove the last occasion Waldo County voted for a Democratic presidential candidate until 1996, and last when Hancock, Knox, and Lincoln Counties would support a Democratic presidential nominee until Bill Clinton in 1992. Johnson's 80.14% in Androscoggin County is also the last time, as of 2020, that any candidate has broken 80% in any Maine county, and the first time that a Democrat has done so since 1836. Johnson's winning margin of over 143,000 votes is the largest in history for a Democratic presidential candidate in Maine, only beaten by Republican Dwight D. Eisenhower's over 146,000 margin in 1956.