Discover the Diocese of Joliet

The Roman Catholic Diocese of Joliet in Illinois (LatinDioecesis Joliettensis in Illinois) is an ecclesiastical territory or diocese of theRoman Catholic Church in the United States. It comprises the City of Joliet in Illinois and its surrounding counties: DuPageFord,GrundyIroquoisKankakeeKendall and Will. It is governed by a bishop, who is a suffragan of the Archbishop of Chicago. The mother church is the Cathedral of St. Raymond Nonnatus.
On Tuesday, May 17, 2011, the Apostolic Nuncio to the United States, Archbishop Pietro Sambi, announced that Pope Benedict XVInamed Bishop R. Daniel Conlon, 62, until then Bishop of the Roman Catholic Diocese of Steubenville in Steubenville, Ohio (part of the Ecclesiastical Province of Cincinnati, Ohio), as Bishop of the Roman Catholic Diocese of Joliet (part of the Ecclesiastical Province of Chicago, Illinois), succeeding Archbishop James Peter Sartain, who was named archbishop of the Seattle, Washington in September 2010.


In 1808, the area that is now known as Joliet was governed by the Diocese of Bardstown, present-day Archdiocese of Louisville inKentucky. In 1824, administration of the area was transferred to the Archdiocese of Saint Louis in Missouri. Another period of reorganization for the expanding American Catholic community led to the transfer of administration over Joliet to the now-defunct Diocese of Vincennes, present-day Archdiocese of Indianapolis. In 1836, with the construction of the I&M canal, Irish immigrants swarmed into the area. Fr. John Plunkett was assigned to provide to the spiritual needs of the workers. He established St. Patrick Church, which is still operating, as the first church in the Joliet area.
With the industrialization of Illinois and the emergence of Chicago as an important center of commerce for the nation, the new churches and missions in the Joliet area flourished. Its congregants were mostly newly arrived immigrant laborers from Europe and several generations of local farmers.
In 1948, the Diocese of Joliet was formally established to meet the demands of the exponential growth of Catholicism in the region, resulting from local post-World War II housing developments and commercial modernization.


Auxiliary bishops

High schools

The Roman Catholic Diocese of Joliet in Illinois serves 655,000 parishioners in 120 parishes & 10 missions. Each year, we serve 39,000 students in 68 schools & 3 universities, 868,000 patients in 3 hospitals, and 36,000 needy in the counties of DuPage, Ford, Grundy, Iroquois, Kankakee, Kendall, and Will.


Mission Statement

We, the Roman Catholic Church of Joliet, 
a people of diverse races and cultures 
within seven counties, 
strive to be the Body of Christ by 
living the Faith, preaching the Word,
building community, serving others, 
especially the poor, 
and celebrating our unity 
through the sacraments.

Bishop R. Daniel Conlon was born in Cincinnati on Dec. 4, 1948. His parents, both still living, are Robert and Carla (Holzman) Conlon. He is the oldest of six children. He grew up as a member of St. Mary Parish, Hyde Park, Cincinnati. On March 9, 1974, he was ordained a deacon at the Cathedral of St. Peter in Chains, Cincinnati. He completed a Master of Divinity degree in 1975 at the Athenaeum of Ohio/Mt. St. Mary Seminary of the West in Cincinnati. After serving as a deacon at St. Agnes Church, Cincinnati, he was ordained a priest on Jan. 15, 1977, at that church. He served as associate pastor at Immaculate Heart of Mary Parish, Anderson Township, Cincinnati, from February, 1977 until July, 1982. Beginning in August, 1981 until August, 1983 he served as director of the Office of Planning and Research and assistant chancellor in the Archdiocese of Cincinnati. For the next three and a half years, he studied canon law at St. Paul University in Ottawa, Ontario, earning the degrees of Doctor of Canon Law and Doctor of Philosophy in January, 1987. He returned to Cincinnati to become the archdiocese’s chancellor and director of its Department of Executive Services, serving in those capacities until July of 1996, when he was named pastor of Holy Redeemer Parish, New Bremen, Ohio. He served there until he was installed as the bishop in the Diocese of Steubenville on Aug. 6, 2002.
Bishop Conlon has served on many committees and boards within the Archdiocese of Cincinnati, including The Catholic Telegraph Board, Board of Mediation, Catholic Committee on Scouting, Futures Committee, Archdiocesan Pastoral Council and Presbyteral Council. He has been active in leadership roles in the St. Mary Deanery. He has also served as an officer and committee member in the Canon Law Society of America. He is a graduate and member of Leadership Cincinnati, a former member of the Cincinnatus Association and a member of the Dan Beard Council President’s Council.
On July 14, 2011, Bishop Conlon was installed as the bishop in the Diocese of Joliet, replacing Bishop Peter Sartain, who had been installed as the Archbishop in the Archdiocese of Seattle in December 2010.
As a member of the United States Conference of Catholic Bishops, Bishop Conlon has served on the Administrative Committee and the Subcommittee on Marriage and Family. Since November 2011, he has served as Chairman of the Committee on the Protection of Children and Young People.



Established by Papal Bull: Dec. 11, 1948

Patron Saint: St. Francis Xavier

Counties: DuPage, Ford, Grundy, Iroquois,

 Kankakee, Kendall, & Will

Square Miles 4,218

Total population 1,888,772

Total Catholic population 655,415

Total Catholic households 187,869


Parishes 120

Missions 10


Diocesan priests 182

Order priests 110

Deacons 205

Women religious 496

Religious brothers 63

Seminarians 28


Early Childhood Centers 7

 Students 1,630

Elementary schools 54

 Students 17,151

High schools 7

 Students 5,407

Universities 3

 Students 14,619

Religious Education

 Elementary Students 47,873

 High School Students 4,561


Catholic hospitals 3

 Patients assisted annually 759,596

Homes for the aged or ill 16

 Number assisted annually 84,001

Specialized homes (e.g., halfway homes) 1

 Number assisted annually 1,904

Centers for Social Services (e.g., food) 5

 Number assisted annually 33,651

Residential care for disabled 1

 Number assisted annually 124


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