St. Marys Township or Saint Marys Township may refer to the following townships in the United States:
St. Marys Township, Adams County, Indiana St. Marys Township, Kansas St. Mary's Township, Wake County, North Carolina St. Mary Township, Hancock County, Illinois Saint Marys Township, Auglaize County, Ohio Saint Mary's Township, Perry County, Missouri
See also St. Mary Township, Waseca County, Minnesota