"Death of a Demon" is a Nero Wolfe mystery novella by Rex Stout, first serialized in three issues of The Saturday Evening Post. It first appeared in book form in the short-story collection Homicide Trinity, published by the Viking Press in 1962.

Nero Wolfe is a 1982 Canadian radio drama series adapted from the Nero Wolfe mysteries by Rex Stout. The series stars Mavor Moore as Nero Wolfe, and Don Francks as Wolfe's assistant Archie Goodwin. Thirteen hour-long episodes were presented by the Canadian Broadcasting Corporation.