John Joseph Swartzwelder Jr. 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 is credited with writing the largest number of Simpsons episodes 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 eleven novels, the most recent of which, The Squirrel Who Saved Practically Everybody, was published in 2019.
Swartzwelder is revered among comedy fans; his colleagues have called him among the best comedy writers. He is famously averse to press.
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