The 1968 United States presidential election was the 46th quadrennial presidential election, held on Tuesday, November 5, 1968. The Republican nominee, former vice president Richard Nixon, defeated both the Democratic nominee, incumbent vice president Hubert Humphrey, and the American Independent Party nominee, former Alabama governor George Wallace. This was the last election until 1988 in which the incumbent president was not on the ballot. This is the most recent election where a third-party candidate won an electoral vote.

The election of the president and the vice president of the United States is an indirect election in which citizens of the United States who are registered to vote in one of the fifty U.S. states or in Washington, D.C., cast ballots not directly for those offices, but instead for members of the Electoral College. These electors then cast direct votes, known as electoral votes, for president, and for vice president. The candidate who receives an absolute majority of electoral votes is then elected to that office. If no candidate receives an absolute majority of the votes for president, the House of Representatives elects the president; likewise if no one receives an absolute majority of the votes for vice president, then the Senate elects the vice president.