Margaret Edith Weis is an American fantasy and science fiction author of dozens of novels and short stories. At TSR, Inc., she teamed with Tracy Hickman to create the Dragonlance role-playing game (RPG) world. She is founding CEO and owner of Sovereign Press, Inc and Margaret Weis Productions, licensing several popular television and movie franchises to make RPG series in addition to their own.

In 1999, Pyramid magazine named Weis one of The Millennium's Most Influential Persons, saying she and Hickman are "basically responsible for the entire gaming fiction genre". In 2002, she was inducted into the Origins Hall of Fame in part for Dragonlance.