John Langdon may refer to:

• John Langdon (bishop) (died 1434), English Bishop of Rochester
• John Langdon (driver) (born 1947), New Zealand harness race driver
• John Langdon (historian) (1944–2016), Canadian historian
• John Langdon (politician) (1741–1819), American politician from New Hampshire
• John Langdon (typographer) (born 1946), American typographer known for his ambigrams

• John Langdon Down (1828–96), British physician

Topics referred to by the same term

This disambiguation page lists articles about people with the same name.
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