Lord Grizzly is a 1954 biographical novel by Frederick Manfred. It was part of his Buckskin Man Tales series of five novels. The novel is the first one published under Frederick Manfred with his prior seven novels published under the name Feike Feikema. A screenplay was written by the husband of the author's daughter Freya, but no film was ever produced. The novel was a bestseller and it was a finalist for the National Book Award in 1955.

Frederick Feikema Manfred was an American writer of Westerns, very much connected to his native region: the American Midwest, and the prairies of the West. He named the area where the borders of Minnesota, Iowa, South Dakota, and Nebraska meet "Siouxland."