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Our History

Celebrating Remarkable

In 1911, four Sisters of Mercy arrived in Ann Arbor from Dubuque, Iowa. They came at the invitation of local medical and religious leaders who dreamed of founding a community hospital to serve area residents. That dream became a reality on November 21, 1911, when the Sisters opened St. Joseph's Sanitarium, a small hospital located in a former student rooming house at the corner of State and Kingsley streets.

The little hospital had a nine-member medical staff and 17 beds on the second and third floors, including eight private rooms. Surgeons operated on the first floor, then carried their patients up the stairs to their rooms above. In its first year, 243 patients were admitted.

In the years that followed, St. Joseph Mercy Ann Arbor grew into a premier health care provider known for its compassion and service. By 1914, St. Joe's had moved to a new facility on Ingalls Street. In 1977, the hospital relocated to its present location on East Huron River Drive.

Today, St. Joe is a renowned clinical, teaching and research center. As we celebrate our past, we also herald the beginning of a new century of caring for those we serve.

Share your stories of St. Joe's
Over a century of service, countless individuals have experienced the compassion and healing touch of our dedicated caregivers at St. Joseph Mercy Ann Arbor. We invite you to share your stories on our blog, "Century of Caring" at


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© 2015 Trinity Health

St. Joseph Mercy Ann Arbor | 5301 McAuley Drive, Ypsilanti, MI 48197 | 734-712-3456