John Thomson Mason may refer to:
John Thomson Mason (1765–1824), American jurist and Attorney General of Maryland in 1806 John Thomson Mason (1787–1850), American lawyer, United States marshal, Secretary of Michigan Territory from 1830 through 1831 John Thomson Mason Jr. (1815–1873), U.S. Representative from Maryland, son of John Thomson Mason (1765–1824)
See also John Mason (disambiguation)