Mary Northern Kinder (August 29, 1909 – May 21, 1981) was a Prohibition era gun moll, most noted for being the girlfriend of Harry Pierpont and associate of John Dillinger. Along with Pearl Elliott, she was one of two women listed by the Chicago Police Department's Public Enemies list in 1933.
At one time, her brother, Earl, husband Dale Kinder, and sweetheart Harry Pierpont were all inmates at the Indiana State Prison at Michigan City, Indiana. Her other brother, Charles, as well as her brother-in-law, William Behrens, were also convicted bank robbers.