Mercy Medical Center, officially Ascension Northeast Wisconsin Mercy Hospital, is a hospital founded in 1891 that serves the city of Oshkosh, in Winnebago County, Wisconsin.

[2] Mercy Medical Center was founded by Father Roman Scholter, pastor of St. Mary's Church in 1891.

He convinced the Sisters of the Sorrowful Mother to come to Oshkosh and start St. Mary's Hospital.

In 1895 the hospital moved into a four-story facility on the corner of Merritt and Boyd Streets which could accommodate 26 patients.

[5] The hospitals and clinics of Affinity Health System were absorbed by and began using the Ascension name beginning September 20, 2016.