Christian Nyby (September 1, 1913 – September 17, 1993) was an American television and film director.
Born in Los Angeles, California, he started his career as a film editor in the 1940s. During this period, he worked on four films for famous director Howard Hawks, of which one (Red River) led to an Academy Award nomination. He began his career in the carpentry division at the studios, worked his way up to editor, then received his first directing credit on Howard Hawks' 1951 production of The Thing from Another World (or The Thing as it is more commonly known), an instant success. Nyby went on to have a prolific television and movie directing career from the 1950s to the 1970s including the films Hell on Devil's Island, Young Fury, and Operation C.I.A. with the first lead role for Burt Reynolds. He directed episodes of almost every major television show of the period, from John Payne's The Restless Gun, Perry Mason, Emergency!, The Twilight Zone, to Kojak.
He died at age 80 in Temecula, California.
Nyby is the father of Christian I. Nyby II, a prolific television director in his own right.