Theophylact Bache (1735-1807) was a New York City merchant at 38 Hanover Square. He was born in Settle, Yorkshire, England, the son of William Bache, a tax collector, and Mary Blyckenden. He was partners with Leonard Lispenard and owner of the ship "Grace." While a promoter of the first Continental Congress, he remained a Loyalist during the War. Bache held offices in the New York Chamber of Commerce, served as president of the St. George's Society of New York from 1788 to 1799, and was instrumental in the incorporation of both the Marine Society and the Society of the New-York Hospital. He was the brother-in-law of Sarah Franklin Bache, Benjamin Franklin's daughter.