John Thomson Mason (January 8, 1787 – April 17, 1850)[1][2][3][4] was an American lawyer, United States marshal, Secretary of Michigan Territory from 1830 through 1831,[2] land agent, and an important figure in the Texas Revolution.

[4] In 1812, Mason left his family stronghold of Northern Virginia to attempt making his own fortunes in Lexington, Kentucky.

[3][4] Mason was appointed Secretary of Michigan Territory and superintendent of Indian affairs in 1830 by President Andrew Jackson.

To fill his post as Secretary of Michigan Territory, President Jackson appointed Mason's son Stevens.

[3] The revolutionary government repudiated the sales of land made in 1834 by the Mexican state of Coahuila y Tejas, going so far as to name Mason's contract as annulled by them in the First Texan Constitution.

[3] Mason was made commandant of the Nacogdoches District by the Committee of Vigilance and Safety on April 11, 1836, only to resign twelve days later.

[1] The couple had at least eleven children:[1] Mason married for a second time to Frances Magruder in Baltimore, Maryland, on June 29, 1845.