John Bassett (born no later than 1503, died 1550 or 1551) was an English landowner and Member of Parliament.
Very little is definitively known about John Bassett's early life. His birthdate is estimated based on his later activities. He held lands in Umberleigh, Devon, and other locations.
Bassett served as a Member of Parliament (MP) for Barnstaple in 1529. This was during the Reformation Parliament, a period of significant religious and political upheaval in England. Records of his specific actions and stances during his parliamentary service are limited.
He married Honor Grenville, daughter of Sir Thomas Grenville of Stowe, Cornwall. Honor Grenville later married Arthur Plantagenet, 1st Viscount Lisle, an illegitimate son of King Edward IV. This marriage linked Bassett to a powerful and influential figure in Tudor society. After Bassett's death, Honor's letters to Arthur Plantagenet, now known as the Lisle Letters, became an important source of information on daily life and political intrigue in the Tudor period.
John Bassett died in either 1550 or 1551. His legacy is primarily associated with his wife, Honor Grenville, and the historical value of the Lisle Letters, which provide insight into the life of a gentry family during the reign of Henry VIII.