Theodore Nevin Morrison (February 18, 1850 – December 27, 1929) was a 20th-century bishop in the Protestant Episcopal Church in the United States of America.

[1] He received a bachelor's degree in 1870 from Illinois College at Jacksonville, and studied for the priesthood at General Theological Seminary in New York City.

He was ordained a priest on February 19, 1876, and served as rector of the Church of the Ascension in Chicago from 1876 to 1899 when he was elected bishop.

[5] St. Katherine's Hall in Davenport was left as the only diocesan educational institution whose administration was transferred to the Sisters of St. Mary in 1902.

[6] Unlike his predecessors, Bishop Morrison was willing to speak out about the social and political issues of the day.

Longley resided in Des Moines and oversaw the missions in the Diocese, and deferred to Morrison on official matters.

His funeral was held at Trinity Cathedral and he was buried in Pine Hill Cemetery in Davenport.