In 1908, the Sisters of St. Joseph of the Third Order of St. Francis came from their motherhouse in Stevens Point, Wisconsin to Ohio to staff schools in Polish parishes.

[2] Founders of Marymount Hospital include Mother Mary Theobold, Warren Chase, Chester Jablonski, and Edmund Lewandowski.

In 1959, Saint Joseph's Teaching Annex was added to make room for the School of Practical Nursing that was established in 1960.

Additionally, Marymount was one of the first hospitals to have a coronary unit, an in-house nurse-training program, psychiatric services, and clinical engineering.

The partnership provides residents the ability to access the physicians and technology of Cleveland Clinic's medical and research center.