Mitchell Joseph Landrieu (born August 16, 1960) is an American lawyer and politician who served as the 61st mayor of New Orleans from 2010 to 2018. A member of the Democratic Party, he previously served as the 51st lieutenant governor of Louisiana from 2004 to 2010.

Landrieu is the son of former New Orleans mayor and Cabinet-secretary Moon Landrieu and the brother of former U.S. senator Mary Landrieu. In 2007, he won a second term as lieutenant governor in the October 20, 2007 nonpartisan blanket primary by defeating two Republicans: state representative Gary J. Beard and singer Sammy Kershaw. On February 6, 2010, Landrieu was elected Mayor of New Orleans, garnering 66 percent of the citywide vote and claiming victory in 365 of the city's 366 voting precincts. He was reelected mayor on February 1, 2014, becoming the first Mayor to win both elections without a runoff and to be elected by majorities of both white and black voters.