John Grant (c. 1570 – 30 January 1606) was a member of the failed Gunpowder Plot, a conspiracy to replace the Protestant King James I of England with a Catholic monarch.

Grant was enlisted by Robert Catesby, a religious zealot who had grown so impatient with James's lack of toleration for Catholics that he planned to kill him, by blowing up the House of Lords with gunpowder.

The plotters laid in front of the fire some of the gunpowder they had collected, to dry out, but a stray spark ignited the powder, and in the resultant conflagration Grant was blinded.

[nb 2] Grant had received a letter from Catesby inviting him to a meeting that took place in Oxford at the Catherine Wheel inn, where he and Robert Wintour swore an oath after which they were told of the plan.

[5][8] Grant's role in the uprising centred on his house at Norbrook, ideally located in the English Midlands close to Warwick and Stratford, and to Catesby's childhood home at Lapworth (then owned by John Wright).

No evidence exists to substantiate this claim, and no trace of a tunnel was ever found, but perhaps because of the change of dates Grant seems not to have been involved in the endeavour, which was stopped when the tenancy to the undercroft beneath the House of Lords became available.

[14] As Catesby added three more to the conspiracy, the last few details were worked out; Fawkes was to light the fuse that would set off the explosion, and then escape to the continent, while the others would incite the Midlands uprising, and capture James's daughter, Princess Elizabeth.

[15] Thus, as the plot moved closer to fruition, on Monday 4 November Grant and a friend were to be found in Dunchurch at the Red Lion inn, with the newly recruited Everard Digby and his "hunting party".

[17] By Wednesday 6 November the government was busy searching for Fawkes' accomplices, and towards the end of the day Grant's name appeared on the list of suspects drawn up by the Lord Chief Justice.

[18] However, confirmation of his status as a fugitive would not arrive until the next day, when provoked by their raid for supplies on Warwick Castle, the government issued a public proclamation naming Percy, Catesby, Rookwood, Thomas Wintour and both Wright brothers as wanted men.

Early the next morning they attended a Mass conducted by Father Nicholas Hart, who also heard their confessions—a sign that in Fraser's opinion demonstrates that none of them thought they had long to live.

Along with Digby and Robert Wintour (Bates was brought separately, from the Gatehouse Prison), Grant was strapped to a wattled hurdle and dragged through the streets of London to St Paul's churchyard, by St.Paul's Cathedral.