John Jardine (July 20, 1935 – March 23, 1990) was an American football player and coach.

He began his coaching career at Central Catholic High School in Lafayette, Indiana in 1958, then moved to the head coaching job at Fenwick High School in Oak Park, Illinois.

Jardine's five teams at Fenwick produced an overall 51–6–1 record and the Friars played in the Chicago Catholic League title game in 1959, 1961, and 1962.

Jardine left the prep ranks following the 1963 season, returning to Purdue as an offensive line coach under Jack Mollenkopf.

Jardine became Wisconsin's head football coach on December 22, 1969 after North Dakota State athletic director and head football coach Ron Erhardt declined a firm offer to accept the position.