Thomas Barbour Bryan (December 22, 1828 – January 26, 1906) was an American businessman, lawyer, and politician. Born in Virginia, a member of the prestigious Barbour family on his mother's side, Bryan largely made a name for himself in Chicago, Illinois. Bryan was involved in many ventures in the city, such as the creation of Graceland Cemetery, and was active in the city's politics, having twice been nominated for mayor. Bryan was a strong unionist during the American Civil War. Bryan was instrumental in Chicago being awarded the World's Columbian Exposition, and was involved in the exposition's organization and operation.