Jacob De Witt (September 17, 1785 – March 23, 1859) was a Quebec businessman and political figure. He was born in Windham, Connecticut in 1785, of Dutch descent, and came to Montreal with his family around 1802. He set up a hardware business with a partner in 1814, opening his own business three years later. He owned a steamship that transported goods on the Saint Lawrence River and owned land and a sawmill in . De Witt was elected to represent Beauharnois in the Legislative Assembly of Lower Canada and elected again in 1834. Although he supported the parti patriote and voted in support of the Ninety-Two Resolutions, he did not take an active part in the Lower Canada Rebellion. He was a charter member of the Bank of Canada and one of the founders of La Banque du Peuple at Montreal. De Witt