Roman Catholic Diocese of Rockville Centre

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Diocese of Rockville Centre
Dioecesis Petropolitana in Insula Longa
CoA Roman Catholic Diocese of Rockville Centre.svg
Country United States
Territory Long Island, New York
Ecclesiastical province New York
- Total
- Catholics
(as of 2014)
1,531,445[1] (53.7%)
Denomination Roman Catholic
Rite Roman Rite
Established April 6, 1957
Cathedral St. Agnes Cathedral
Patron saint Saint Agnes
Current leadership
Pope Francis
Bishop John Barres
Metropolitan Archbishop Timothy Cardinal Dolan
Auxiliary Bishops Andrzej Jerzy Zglejszewski
Robert John Brennan
Robert Joseph Coyle
Emeritus Bishops William Murphy
Diocese of Rockville Centre map 1.png

The Roman Catholic Diocese of Rockville Centre (Latin: Dioecesis Petropolitana in Insula Longa) comprises the territory of Nassau and Suffolk counties (regionally known as Long Island) in New York state, USA; although Fishers Island is part of Suffolk County, it is included in the Diocese of Norwich, Connecticut. Founded in 1957, this diocese was created from territory that once belonged to the Diocese of Brooklyn. It is the sixth-largest Catholic diocese in the United States, currently serving approximately 1.5 million people in 134 parishes.[2] The diocese is named for the village where its cathedral, St. Agnes Cathedral, is located, Rockville Centre in Nassau County. The fifth and current bishop is John Barres.[3]


Most Reverend Walter P. Kellenberg served as first bishop of the diocese from 1957-1976. Kellenberg was followed by Bishop John McGann, who retired in 2000 and died in 2002. The diocese was led briefly by Bishop James T. McHugh, who died of cancer on December 10, 2000.

The Most Reverend William Murphy served as the diocese's fourth bishop from 2001 to 2017. Murphy arrived in Long Island from his native Archdiocese of Boston, where he served as the archdiocese's vicar general. He was succeeded by John Barres on January 31, 2017.


The following are the lists of the diocesan and auxiliary bishops and their years of service:

Bishop Previous Position Appointed By Tenure Tenure length
1 Walter Philip Kellenberg
Bishop of Ogdensburg Pope Pius XII April 16, 1957

May 3, 1976
18 years, 353 days
2 John Raymond McGann
Vice-Chancellor of the

Diocese of Rockville Centre

Pope Paul VI June 24, 1976

January 4, 2000
23 years, 194 days
3 James Thomas McHugh
Coadjutor Bishop of the

Diocese of Rockville Centre

Pope John Paul II January 4, 2000

December 10, 2000
341 days
4 William Francis Murphy
Auxiliary Bishop of Boston September 5, 2001

January 31, 2017
15 years, 148 days
5 John Oliver Barres
Bishop of Allentown Pope Francis January 31, 2017

1 year, 140 days

† = deceased

Auxiliary bishops[edit]


Other priests of this diocese who became bishops[edit]

† = deceased





St. Agnes Cathedral

High schools[edit]



Elementary schools[edit]


  • Holy Child Academy (Old Westbury)
  • St. Christopher's (Baldwin)
  • Our Lady of Grace (Manhasset)
  • St. Martin de Porres (Uniondale)
  • De La Salle (Freeport)
  • Our Lady of Mercy (Hicksville)
  • St. Patrick (Huntington)
  • St. Elizabeth Ann Seton (Bellmore)
  • St. Peter of Alcantara (Port Washington)

Province of New York[edit]

See: List of the Catholic bishops of the United States


  1. ^ Who We Are. Diocese of Rockville Centre. Retrieved September 24, 2015.
  2. ^ "Archived copy". Archived from the original on 2007-08-05. Retrieved 2005-12-14. 
  3. ^ "New Long Island bishop to be installed today". Newsday. Retrieved 2017-01-31. 

External links[edit]

Coordinates: 40°39′48″N 73°38′13″W / 40.66333°N 73.63694°W / 40.66333; -73.63694