Mount Morris College was a religious college affiliated with the Church of the Brethren in Mount Morris, Illinois, USA. The original institution at this location was Rock River Seminary, which was founded by the Methodist Church in 1839. The Methodists closed Rock River Seminary in 1878 and subsequently sold the seminary grounds and buildings to the Church of the Brethren. The Brethren reorganized the school and reopened it in 1879 as Mount Morris Seminary and Collegiate Institute. It officially became Mount Morris College in 1884.