Jon Stewart (born Jonathan Stuart Leibowitz; November 28, 1962) is an American comedian, writer, producer, director, political commentator, actor, and television host. He hosted The Daily Show, a satirical news program on Comedy Central, from 1999 to 2015.

Stewart started as a stand-up comedian but branched into television as host of Short Attention Span Theater for Comedy Central. He went on to host The Jon Stewart Show and then You Wrote It, You Watch It, both on MTV. Stewart has also appeared in several films, such as Big Daddy (1999) and Death to Smoochy (2002), but did few cinematic projects after becoming host of The Daily Show in 1999. He was also a writer and co-executive producer of the show. After Stewart joined, The Daily Show steadily gained popularity and critical acclaim, and during his tenure, The Daily Show won 22 Primetime Emmy Awards.

Stewart is known as an outspoken, humorous critic of personality-driven media shows, in particular, those of the U.S. media broadcast networks such as CNN, Fox News, and MSNBC. Critics say Stewart benefits from a double standard: he critiques other news shows from the safe, removed position of his "news satire" desk; Stewart asserts that neither his show nor Comedy Central purport to be anything other than satire and comedy. In spite of its self-professed entertainment mandate, The Daily Show has been nominated for news and journalism awards among its accolades. Stewart hosted the 78th and 80th Academy Awards. He is the co-author of America (The Book): A Citizen's Guide to Democracy Inaction, which was one of the best-selling books in the U.S. in 2004, and Earth (The Book): A Visitor's Guide to the Human Race, released in 2010.

Since leaving The Daily Show, Stewart has for the most part maintained a low profile, with his sustained advocacy for 9/11 first responders being a notable exception.