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:
“This is what the Church is said to want, not party men, but sensible, temperate, sober, well-judging persons, to guide it through the channel of no-meaning, between the Scylla and Charybdis of Aye and no.”
—Cardinal John Henry Newman (1801–1890)