The Right Honourable John Michael Jack (born September 17, 1946) is a Conservative Party politician in the United Kingdom. He has been member of Parliament for Fylde since the 1987 election, and served at various junior ministerial posts during the John Major administration.

He is a pro-European, and member of the Tory Reform Group. William Hague appointed him a member of his Shadow Cabinet in 1997 as Shadow Agriculture Minister, but he returned to the back-benches in 1998.