Silas C. Overpack (1841–1927) was a blacksmith, wheelwright, and businessman. He owned a shop (around 1868) in downtown Manistee, Michigan, at 87 Pine Street, called S.C. Overpack Wagon, Carriage and Blacksmith Shop and is associated with the invention of Michigan logging wheels. These unusually large wagon wheels (10 feet in diameter) were used in the timber industry for hauling logs in difficult terrain.