Captain William J. Minor (January 27, 1808 – September 18, 1869) was an American planter, slave owner, and banker in the antebellum South. Educated in Philadelphia, he lived at the Concord plantation in Natchez, Mississippi, and served as the second President of the Agricultural Bank. He was the owner of three large sugar plantations in Louisiana and supported the Union during the Civil War for the stability of the sugar trade.