Michael Farrand Bennet (born November 28, 1964) is an American attorney, businessman, and politician serving as the senior United States senator from Colorado, a seat he has held since 2009. A member of the Democratic Party, he was appointed to the seat when Senator Ken Salazar became Secretary of the Interior. Bennet previously worked as a managing director for the Anschutz Investment Company, chief of staff to Denver mayor (and his future Senate colleague) John Hickenlooper, and superintendent of Denver Public Schools.

Bennet is the son of Douglas J. Bennet, a former State Department official and president of Wesleyan University. Early in his career, Bennet worked for Ohio Governor Richard Celeste. He received a Juris Doctor degree from Yale Law School, worked as a law clerk, and was counsel to the U.S. Deputy Attorney General during the administration of Bill Clinton.

Bennet served then Mayor John Hickenlooper as his chief of staff from 2003 to 2005 and became superintendent of the Denver public school system in July 2005. Governor Bill Ritter appointed Bennet to fill the U.S. Senate seat vacated by Ken Salazar when Salazar became Secretary of the Interior in January 2009. Bennet was elected in the 2010 Senate election, defeating Republican nominee Ken Buck. He chaired the Democratic Senatorial Campaign Committee (DSCC) for the 2014 cycle and was reelected to the Senate in 2016 and 2022.

On May 2, 2019, Bennet announced his candidacy for the Democratic nomination for president of the United States. He dropped out of the race on February 11, 2020, after a poor showing in the New Hampshire primary.