John Langdon may refer to:
- John Langdon (politician) (1741–1819), American politician from New Hampshire
- John Langdon (typographer) (born 1946), American typographer known for his ambigrams
- John Langdon Down (1828–1896), doctor
- John Langdon (bishop) (died 1434), English Bishop of Rochester
- John Langdon (driver) (born 1947), New Zealand harness race driver
Famous quotes containing the word john:
“Now John wore clothing of camel’s hair with a leather belt around his waist, and his food was locusts and wild honey.”
—Bible: New Testament, Matthew 3:4.