William Benjamin Robinson (December 22, 1797 – July 18, 1873) was a fur trader and political figure in Upper Canada. He was born in Kingston in 1797, the son of Christopher Robinson and Esther Sayre, and moved to York (Toronto) with his family in 1798. In 1802, his mother remarried after his father's death and moved to Newmarket, where he grew up. Robinson later took over his stepfather's (Elisha Beman) mills and stores. He later joined his brother Peter in the fur trade, operating mainly in the Muskoka district. In 1830, he was elected to the Legislative Assembly of Upper Canada for Simcoe; he was reelected in 1834 and 1836. He oversaw the development of the Welland Canal starting in 1833.