Bill Callahan (born July 31, 1956, in Chicago, Illinois) is the Assistant Head Coach/Offense for the New York Jets. He was formerly the head coach of the Oakland Raiders for the 2002-2003 seasons and for the University of Nebraska for the 2004-2007 seasons. He was fired from both positions after posting a losing record in his final season with the teams.
Callahan was a four-year starter at quarterback at Illinois Benedictine College in Lisle, Illinois, where he was an NAIA honorable mention All-American in his final two seasons.
The Chicago native began his college coaching career in 1980 as a graduate assistant at University of Illinois before being promoted to full time assistant in 1981, coaching tight ends, offensive line, quarterbacks and special teams through 1986.