Donald Ragnvald Christensen (July 6, 1916 – October 18, 2006) was an American animator, cartoonist, illustrator, writer and inventor.

He left the studio after the 1941 Disney animators' strike, during which he met his wife-to-be, Ivy-Carol Van Horn, a special effects detail artist.

Christensen then worked briefly at Warner Bros. Cartoons, primarily as a storyboard artist for Bob Clampett's animation unit.

After leaving Warner Bros. he worked independently for nearly four decades as a storyboard writer and artist, primarily for Western Publishing, Dell and Gold Key comic books, as well as Hanna Barbera, Walter Lantz Productions, Filmation, DePatie-Freleng Enterprises, and other cartoon studios.

He wrote and provided illustrations for such comic book titles as Magnus, Robot Fighter, Donald Duck, and Uncle Scrooge.