The Ypsilanti State Hospital housed and treated patients for mental health disorders. The hospital complex was located at the northeast corner of Platt and Willis Roads, in York Charter Township; one mile south of the boundary with Pittsfield Charter Township and two miles west of the Augusta Charter Township boundary. The City of Saline was four miles due west of the hospital on Willis Road, while the City of Milan was five miles due south on Platt Road. The hospital, which was three miles from the point where York and Ypsilanti charter townships meet, was called "Ypsilanti" because the area is served by the Ypsilanti telephone exchange.