1964 United States presidential election in New Mexico

The 1964 United States presidential election in New Mexico took place on November 3, 1964. All fifty states and The District of Columbia, were part of the 1964 United States presidential election. State voters chose four electors to represent them in the Electoral College, who voted for president and vice president.

New Mexico was won by President Lyndon B. Johnson in a 19-point landslide. Johnson had won after serving as president for one year following the Assassination of John F. Kennedy. Arizona Senator Barry Goldwater lost most of the United States in this election, except for his home state and portions of the American South. Goldwater won only three counties: the Plains counties of Union and Harding, which as of the 2024 presidential election have never voted Democratic since 1948, and Lincoln County, which has never voted Democratic since 1936. Even in these, Goldwater won only narrowly: his highest proportion of the vote was only 52.55 percent in Lincoln County. Four other normally reliably Republican counties – San Juan, Curry, Chaves and Catron – were narrowly won by Johnson and have never voted for a Democrat since. This is also the last time the southeastern counties of Roosevelt, Otero and Lea have voted Democratic. This would be the last occasion until 2008 that a Democratic presidential nominee would carry Los Alamos County. New Mexico as a whole, along with Bernalillo, Doña Ana, Luna, and Sierra counties would not vote Democratic again until 1992, after which the state has always gone Democratic except in 2004 when George W. Bush very narrowly won the state over John Kerry.

At the other extreme, Grant and Sandoval Counties both gave Johnson over seventy percent of the vote, and the populous counties of Santa Fe and Taos also gave him over two-thirds.