John Leland may refer to:

• John Leland (antiquary) (c. 1503–1552), English antiquary
• John Leland (Baptist) (1754–1841), United States Baptist minister
• John Leland (journalist) (born 1959), New York Times reporter, columnist, and book author
• John Leland (politician) (died 1808), British Army general and English Member of Parliament for Stamford, 1796–1808
• John Leland (Presbyterian) (1691–1766), English Presbyterian minister
• John E. Leland, American engineer and Director of the University of Dayton Research Institute

• John Leland Atwood (1904–1999), American aerospace engineer
• John Leland Center for Theological Studies in Virginia, United States
• John Leland Champe (1895–1978), American archaeologist