Harry Lloyd (?-c. 1916) was born and died in an unknown location. He was a carpenter by trade, and became a labor leader and unionist in Boston, Massachusetts. Between 1896-1898 he was President of the United Brotherhood of Carpenters and Joiners of America. He was also a member of the Carpenters' International Union, and ran for the Presidency of the American Federation of Labor in 1896. Lloyd studied Christian Science with Eldora O. Gragg, a student of Mary Baker Eddy. He joined The First Church of Christ, Scientist, in Boston, Massachusetts, on June 10, 1902. He was also a member of First Church of Christ, Scientist, Cambridge, Massachusetts.

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