Donald Roynald Bensen (October 3, 1927 – October 19, 1997), also known as Don Bensen and sometimes listed as D.R. Bensen, was an American editor and science fiction writer. Editorally he is best known for editing works of P. G. Wodehouse and his involvement in their re-issue in paperback in the United States. Authorially, he is best known for his 1978 alternative history novel, And Having Writ…, published first by Bobbs-Merrill.

Bensen's literary career began as a literary agent at Scott Meredith. He was appointed editor of Pyramid Publications in 1957, and was eventually, if not immediately, editor-in-chief there. Later he was a senior editor for Ballantine Books and afterwards the Berkely Publishing Corporation of New York. In 1983 he joined Keats Publishing, where he also became editor-in-chief.

As a writer, Bensen was the author of And Having Writ…, the "Tracker" western novels, and a number of other books. He was associated with the Mystery Writers of America and the Trap Door Spiders (on whose fictional equivalent, the Black Widowers, he published a poem of the same name in 1977).

He died at the age of 70 at his home in Croton-on-Hudson, New York in 1997.[