Josiah Bennett Dyer (January 5, 1843 – March 12, 1900) was a British-born American labor union leader.
Born in Luxulyan in Cornwall, England, Dyer completed an apprenticeship as a stonecutter, and joined the Operative Society of Masons.
[1][2] Dyer founded an early branch of the Knights of Labor in Boston.
He also joined the Granite Cutters' International Union, and in 1877 he organized a new branch in Graniteville, Massachusetts.
[3][4] Dyer served as secretary of the union until 1895, moving with its headquarters to various locations, including Philadelphia.