John Boste (c. 1544 – 24 July 1594) is a saint in the Catholic Church, and one of the Forty Martyrs of England and Wales.

Arriving in London, he posed as a servant a conforming Catholic household of Lord Montacute before returning north.

In January 1584 the Privy Council ordered Lord Scrope, Warden of the Western March, to take energetic measures for his arrest.

[4] Boste evaded arrest for ten years but was betrayed to the authorities near Durham in 1593 by former Catholic Francis Egglesfield.

[5] While leaving a clandestine Mass held at the Waterhouse on the Neville estate, Egglesfield asked the priest for a blessing.

[1] His limbs were hung on the castle walls, head displayed on a pole on Framwellgate Bridge, but removed that night by someone unknown.