Timothy Clement Smyth OCSO (February 24, 1810 – September 22, 1865) was an Irish born 19th century bishop of the Catholic Church in the United States.

Because of the devastation brought about by the Great Famine in Ireland in the 1840s the community started looking for a place in North America for a new abbey where the monks could farm the land.

[2] Shortly after his episcopal consecration, Smyth was assigned administrator of the Diocese of Chicago while O'Reagan went to Rome to resign his see.

He had to deal with an apostate priest, Charles Paschal Chiniquy, who had set up a schismatic church in Kankakee, Illinois.

[4] A happier occasion for Smyth occurred in 1863 when he consecrated Ephraim McDonnell as the first abbot for New Melleray after it had been elevated to an abbey by the Holy See.

[6] One of the most outspoken critics of President Lincoln and the abolitionists was the editor of the local Democratic newspaper and a friend and an advisor to Loras, Dennis A. Mahoney.

Smyth, unlike Loras who had spent many years as a missionary in Alabama and as a slaveholder, supported the Union cause.

Local citizens, both Catholic and Protestant, built a new coach house and bought a new carriage and a pair of horses for the bishop.

Before his death in 1900, Hennessy requested that a mortuary chapel be built to serve as a final resting place for bishops and archbishops of Dubuque.