Mary Theresa McKee Waggaman (September 21, 1846 – July 30, 1931) was an American author of Catholic literature in the early 20th century who was primarily known for writing short stories for children.

[1] As early as 1871 Waggaman was a published writer, starting with a poem in the January 1972 issue of Harper's Magazine.

[6][7] Waggaman's first short story was "Little Comrades" which she wrote to impress upon her first son the importance of his First Communion.

[5]: 273 In 1923 Waggaman won first prize for a story she submitted to the Columbian magazine published by the Knights of Columbus.

[17] In 1942, her daughter Ester W. Neill, who was also a writer,[5]: 207–209  wrote about her mother in The Book Of Catholic Authors First Series.