Jill A. Davis (born 1966) is an American author and television writer. She is a member of the Writers Guild of America. She was nominated for five Emmy awards for her six years of work as a writer for David Letterman. Her first novel, Girls' Poker Night (published by Random House in 2002), was a New York Times bestseller. It was published in five languages, and twelve countries. Her second novel, Ask Again Later, was published by Ecco in February 2007.