Madame Montour (1667 or c. 1685 – c. 1753) was an interpreter, diplomat, and local leader of Algonquin and French Canadian ancestry. Although she was well known, her contemporaries usually referred to her only as "Madame" or "Mrs." Montour. She may have been Isabelle (or Elizabeth) Couc, a mixed born in 1667, or perhaps Isabelle Couc's niece, who was born around 1685 and whose given name is uncertain.