Fahrenheit 11/9 is a 2018 American documentary by left-wing filmmaker Michael Moore about the 2016 United States presidential election and presidency of Donald Trump up to the time of the film's release. The film is a follow-up to Moore's Fahrenheit 9/11 (2004), a documentary about the presidency of George W. Bush. The film had its world premiere on September 6, 2018, at the 2018 Toronto International Film Festival, and was released in the United States on September 21, 2018, by Briarcliff Entertainment.

Despite grossing $6.7 million worldwide, one of the lowest totals of Moore's career, Fahrenheit 11/9 received generally positive reviews from critics. The film received a nomination for Best Documentary Screenplay from the Writers Guild of America. Several of the people depicted in the film (Donald and Melania Trump and Kellyanne Conway) collectively received four nominations at the 39th Golden Raspberry Awards and won three, including Worst Actor for Donald Trump.