Marcia Karen Wallace (November 1, 1942 - October 25, 2013) was an American actress, voice artist, comedian, and game show panelist who was best known for her television role as Carol Kester on the CBS sitcom The Bob Newhart Show from 1972 to 1978, and for her voice role as Edna Krabappel on the Fox animated sitcom The Simpsons from 1990 until her death of pneumonia and sepsis in 2013.

For Disney, she voiced Clovis and Mrs. Cavanaugh in Darkwing Duck, Oopo in the Aladdin TV series, and the Librarian in Monsters University.