John Swartzwelder

John Joseph Swartzwelder Jr. (born February 8, 1949) is an American comedy writer and novelist, best known for his work on the animated television series The Simpsons. Born in Seattle, Washington, Swartzwelder began his career working in advertising. He was later hired to work on comedy series Saturday Night Live in the mid-1980s as a writer. He later contributed to fellow writer George Meyer's short-lived Army Man magazine, which led him to join the original writing team of The Simpsons, beginning in 1989.

He worked on The Simpsons as a writer and producer until 2003, and later contributed to The Simpsons Movie. He wrote the largest number of Simpsons episodes (59 full episodes, with contributions to several others) by a large margin. After his retirement from the show, he began a career as a writer of self-published absurdist novels. He has written more than a dozen novels, the most recent of which, The Spy with No Pants, was published in December 2020.

Swartzwelder is revered among comedy fans; his colleagues have called him among the best comedy writers. He is known for his reclusiveness, and gave his first-ever media interview in 2021, 18 years after his final Simpsons episode.