Lemony Snicket is the pen name of American author Daniel Handler (born February 28, 1970). Handler has published various children's books under the name, including A Series of Unfortunate Events, which has sold over 60 million copies and spawned a 2004 film and Netflix TV series from 2017 to 2019 of the same name. Lemony Snicket also serves as the in-universe author who investigates and re-tells the story of the Baudelaire orphans in A Series of Unfortunate Events.

Snicket is also the subject of a fictional autobiography titled Lemony Snicket: The Unauthorized Autobiography. Further telling of Snicket's adventures can be found in the four-part children's series All the Wrong Questions, as well as a pamphlet titled 13 Shocking Secrets You'll Wish You Never Knew About Lemony Snicket (released in promotion of The End). Other works by Snicket include The Baby in the Manger, The Composer Is Dead, Horseradish: Bitter Truths You Can't Avoid, The Latke Who Couldn't Stop Screaming, The Lump of Coal, and 13 Words.

In the 2004 film, Lemony Snicket is voiced by Jude Law while James Henderson plays him physically, who documents the events of the film on a typewriter from inside a clock tower. In the video game based on the film, his voice is provided by Tim Curry. In the Netflix series, Snicket is interpreted as a mysterious and omniscient narrator chronicling the events of the Baudelaire children, and is portrayed by Patrick Warburton.