Roman Catholic Diocese of Rockville Centre

Diocese of Rockville Centre Dioecesis Petropolitana in Insula Longa
St. Agnes Cathedral
Coat of arms
Location
Country	United States
Territory	Long Island, New York
Ecclesiastical province	New York
Statistics
Population - Total - Catholics	(as of 2014) 2,851,977 1,531,445[1] (53.7%)
Parishes	134
Information
Denomination	Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	April 6, 1957
Cathedral	St. Agnes Cathedral
Patron saint	Saint Agnes[2]
Current leadership
Pope	Francis
Bishop	John Barres
Metropolitan Archbishop	Timothy M. Dolan
Auxiliary Bishops	Andrzej Jerzy Zglejszewski Robert J. Coyle Luis Miguel Romero Fernández
Bishops emeritus	William Murphy John Charles Dunne
Map
Website
drvc.org

The Diocese of Rockville Centre (Latin: Dioecesis Petropolitana in Insula Longa) is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in the Long Island region of New York State in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of New York.

The current bishop is John Barres. The cathedral is St. Agnes Cathedral, in Rockville Centre, New York. Founded in 1957, this diocese was created from territory that formerly belonged to the Diocese of Brooklyn. It includes all of Nassau and Suffolk counties except for Fishers Island, which is part of the Diocese of Norwich. As of 2005^[update], it the sixth-largest Catholic diocese in the United States, currently serving approximately 1.5 million people in 134 parishes.^[3]