John Boardman may refer to:

• John Boardman (physicist) (born 1932), American physicist, science fiction fan, author and gaming authority
• Sir John Boardman (art historian) (born 1927), British classical art historian and archaeologist
• John Joseph Boardman (1893–1978), American Roman Catholic bishop
• John Boardman (merchant) (1758–1813), early settler of Troy, New York