Mother Mary Raphael Slattery, S.P., (January 17, 1863 – September 9, 1940) was the superior general of the Sisters of Providence of Saint Mary-of-the-Woods, Indiana, from 1926 to 1938.

In the midst of the Depression, Slattery had Saint Mary-of-the-Woods College, originally under the finances of the congregation, separately incorporated in order to protect its future.

Slattery also sent Sisters of Providence for the first time to minister in Oklahoma, North Carolina and California.

[2] Born Mary Slattery in Galesburg, Illinois, she entered the congregation on September 4, 1882, and was professed as a full Sister of Providence on August 15, 1885.

She spent time ministering in Valparaiso, Indiana, and at Saint Agnes Academy in Indianapolis.