List of schools of the Roman Catholic Diocese of Rockville Centre.
As of 2019, there were nine Catholic schools on Long Island with high school divisions.
6-12 schools
Private
Kellenberg Memorial High School, Uniondale
High schools
Diocesan
Holy Trinity Diocesan High School, Hicksville
St. John the Baptist Diocesan High School, West Islip
Private
Chaminade High School, Mineola
Our Lady of Mercy Academy, Syosset
Sacred Heart Academy, Hempstead
St. Anthony's High School, South Huntington
St. Dominic High School, Oyster Bay
St. Mary's High School, Manhasset
Elementary and junior high schools
Diocesan
Nassau County
Holy Family School (Hicksville) Holy Name of Mary Catholic School (Valley Stream) Long Beach Catholic Regional School (Long Beach) Maria Regina School (Seaford) Notre Dame Catholic School (New Hyde Park) Our Lady of Lourdes School (Malverne) Our Lady of Peace School (Lynbrook) Our Lady of Victory Elementary School (Floral Park) St. Agnes Cathedral School (Rockville Centre) St. Aidan Catholic School (Williston Park) St. Anne's School (Garden City) St. Brigid/Our Lady of Hope Regional School (Westbury) St. Christopher Catholic School (Baldwin) St. Edward the Confessor School (Syosset) St. Elizabeth Ann Seton Regional (Bellmore) St. Joseph School (Garden City) St. Mary's Elementary School (Manhasset) St. Raymond Catholic School (East Rockaway) St. Rose of Lima Catholic School (Massapequa) St. Thomas the Apostle School (West Hempstead) St. William the Abbot School (Seaford) Suffolk County Holy Angels Regional School (Patchogue) Our Lady of Providence Regional School (Central Islip) Our Lady of the Hamptons (Southampton) Our Lady, Queen of the Apostles Regional Catholic School (Center Moriches) Ss Cyril and Methodius School (Deer Park) St. John Paul II Regional School (Riverhead) St. Martin of Tours Catholic School (Amityville) St. Mary School (East Islip) St. Patrick School, Bay Shore (Bay Shore) St. Patrick School, Huntington (Huntington) St. Patrick School, Smithtown (Smithtown) Sts. Philip and James School (St James) Trinity Regional School (East Northport)
Private (non-diocesan) Holy Child Academy (Old Westbury) The De La Salle School (Freeport) Our Lady of Grace Montessori School (Manhasset) St. Martin de Porres Marianist School (Uniondale)
Former schools
In the 2000-2001 school year the archdiocese had 28,709 students at the elementary level. By the 2010-2011 school year this was 19,261, a decline of 34%. Six Catholic elementary schools closed in 2012, with 47 remaining. Both seminaries located in the Diocese of Rockville Centre, have been closed down mainly due to the declining numbers of priestly vocations. The Diocese of Rockville Centre currently has no active seminaries within its territory and currently uses the seminary facilities of the Diocese of Brooklyn and the Archdiocese of New York for its seminarians.
Seminaries
Nassau County
St. Pius X Preparatory Seminary (Uniondale)- college/minor seminary of the Diocese that operated from 1961 to 1984 Suffolk County Seminary of the Immaculate Conception (Huntington)- operated from 1926 to 2012. The territory of Rockville Centre was part of the Diocese of Brooklyn until 1957, so the seminary was under Brooklyn's jurisdiction until 1957 and served as Brooklyn's major seminary. After the establishment of the Rockville Centre Diocese in 1957, the seminary fell under the jurisdiction of the newly established diocese since it was located in its territory. The Brooklyn Diocese continued to use the seminary as their major seminary along with Rockville Centre until 2012, when the seminary program was shut down and was transferred to St. Joseph's Seminary in Yonkers, NY. The seminary facility continues to be open today, serving mostly as a retreat center.
High schools
Diocesan
St. Pius X Preparatory Seminary (Uniondale)- High School Seminary that operated from 1961 to 1984 Bishop McGann-Mercy Diocesan High School, Riverhead (closed in June 2018) Private Academy of Saint Joseph, Brentwood (Closed June 2009)