John Todd or Tod may refer to:
Clergy John Todd (abolitionist) (1818–1894), preacher and 'conductor' on the Underground Railroad John Todd (author) (1800–1873), American minister and author John Todd (bishop), Anglican bishop in the early 17th century John Baptist Todd (1921–2017), Pakistani Franciscan priest
Mathematics, science, and medicine John Todd (British biologist) (born 1958), British biologist working on diabetes mellitus John Todd (Canadian biologist) (born 1939), Canadian biologist working in the field of ecological design John (Jack) Todd (1911–2007), Northern Irish and American mathematician working in the field of numerical analysis J. A. Todd (John Arthur Todd, 1908–1994), English mathematician John Lancelot Todd (1876–1949), Canadian physician and parasitologist John W. Todd (1912–1989), British physician and author
Politics and government John Tod (1779–1830), American judge and politician John Todd (politician) (), Canadian politician from the Northwest Territories John Todd (Virginia soldier) (1750–1782), early Virginia official, Kentucky soldier, and great-uncle of Mary Todd Lincoln John Blair Smith Todd (1814–1872), delegate to US Congress from Dakota Territory John J. Todd (1927–2024), Justice of the Minnesota Supreme Court John Rawling Todd (1929–2002), British colonial civil servant
Sports John Kennedy Tod (1852–1925), Scottish rugby union player John Todd (footballer) (1938–2024), Australian rules football player and coach John Todd (rugby league), rugby league footballer of the 1910s and 1920s
Other John Todd (actor) (1876–1957), American actor who played Tonto on the Lone Ranger radio series John Todd (businessman) (1927–2015), New Zealand businessman John Todd (conspiracy theorist) (1949–2007), source for fundamentalist Baptist author Jack Chick John Todd (RAF officer) (1899–1980), British World War I flying ace John Payne Todd (1792–1852), step-son of U.S. President James Madison
See also John Tod (1779–1830), member of the U.S. House of Representatives from Pennsylvania Jack Todd (disambiguation)