John Fenn

John Fenn is the name of:

• John Fenn (priest) (died 1615)
• John Fenn (antiquarian), 18th-century antiquarian who edited and published the Paston Letters
• John Fenn (chemist) (1917–2010), research professor of analytical chemistry who was awarded the Nobel Prize in Chemistry in 2002
• John Fenn (pirate), early 18th century English pirate