George Hinckley Lyman (December 13, 1850 – May 17, 1945) was an American political figure who served as chairman of the Massachusetts Republican state committee and collector of customs for the port of Boston.

After spending one year of study in Germany, Lyman returned to Boston to complete his legal training with the firm of Ropes, Gray, & Loring.

[4][page needed] On February 17, 1898, Lyman was nominated by President William McKinley for the position of collector of customs for the district of Boston.

[7] Lyman's administration as collector was described by A. Maurice Low of The Boston Daily Globe as having been "managed in the interest of both the government and the merchants doing business with the customhouse, and that there has been practically no friction.

[9] In February 1902, The Boston Daily Globe reported that Massachusetts Governor Winthrop M. Crane and others suggested to President Roosevelt that Lyman would be an able successor to United States Secretary of the Navy John Davis Long.

On October 17, 1903, United States Assistant Secretary of the Treasury Robert B. Armstrong commenced an investigation into frauds and irregularities at the Boston customhouse.