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Suffragan diocese Joliet, Illinois, United States

Diocese of Joliet in Illinois

Iolietten(sis) in Illinois

Latin Church

The Diocese of Joliet in Illinois is a Latin Church diocese covering seven counties in northeastern Illinois, erected in 1948. The see is currently vacant, with Bishop Dennis E. Spies serving as Apostolic Administrator after Ronald A. Hicks was named Archbishop of New York in early 2026.

On the map

Esri
The address the register holds for Cathedral of St. Raymond Nonnatus, in Joliet, United States.

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Established
1948
Catholics
520,148
Priests
267
Territory
10,925 km²

Parishes and churches

133 listed churches in our records. Open a parish for Mass times, confession, directions and sources where recorded.

This is our recorded coverage, not an official diocesan parish count. Confirm service times with the parish before travelling.

The bishop

Apostolic Administrator
Dennis E. Spies (Apostolic Administrator)
Born
5 March 1968
Birthplace
Clifton

Explore the ministry of the bishop.

The cathedral

Cathedral of St. Raymond Nonnatus stands in Joliet, the church that holds the cathedra from which this see takes its name.

On what a cathedral is, see the cathedral; every see church on earth is gathered at the cathedrals.

This see in the wire

Stories that name this see

The wire's resolver matched this see in the text of each story.

  • Pope Leo XIV appoints Bishop Brendan Cahill as Bishop of Joliet

    Pope Leo XIV has appointed Brendan J. Cahill as the new bishop of Joliet, Illinois. Archbishop Gabriele Caccia, the apostolic nuncio to the United States, announced the appointment on September 17, 2026. Bishop Cahill, who has led the Diocese of Victoria in Texas since 2015, succeeds Ronald A. Hicks. Hicks previously served as the bishop of Joliet for five years before being appointed archbishop of New York in December 2025. Since that time, Auxiliary Bishop Dennis E. Spies has served as the apostolic administrator for the Joliet Diocese. Cahill currently serves a three-year term as chairman of the United States Conference of Catholic Bishops Committee on Migration. He was ordained a priest for the Archdiocese of Galveston-Houston in 1990 and received his episcopal consecration in 2015. Archbishop Hicks described Cahill as a man of deep faith and a pastor for those on the margins, noting that his fluency in Spanish will benefit the diocese. The Diocese of Joliet plans to schedule Cahill's installation Mass for November.

    Sep 18, 2026 · Bishops · 9 sources

Filed by the see itself

Published on the see's own news feed. A diocese reports on the whole Church, so these are often about somewhere else.

8 stories in the wire either name this see or come from its own feed. Read the wire.