#1 Best Catholic Schools in the Diocese of Rockville Centre
Our Lady of Mercy Academy
Independent Catholic school · Grades 9–12
The only all-girls school in Syosset
Syosset, NY
A+Overall gradeAll girls195 students7 students per teacher
2026 lists
Best Catholic Schools in the Diocese of Rockville Centre
The highest-graded schools of this kind in the Diocese of Rockville Centre. Top 31 of 31 schools.
#2 Best Catholic Schools in the Diocese of Rockville Centre
St. Brigid/Our Lady of Hope Regional School
Diocesan school · Grades Pre-K–8
The only Catholic school in Westbury
Westbury, NY
A+Overall grade182 students10 students per teacher
#3 Best Catholic Schools in the Diocese of Rockville Centre
St. Edward Confessor School
Parish school · Grades Pre-K–8
Smaller classes than 80% of Catholic schools in New York
Syosset, NY
A+Overall grade150 students8 students per teacher
#4 Best Catholic Schools in the Diocese of Rockville Centre
Our Lady of the Hamptons Regional Catholic School
Parish school · Grades Pre-K–8
The only Catholic school in Southampton
Southampton, NY
A+Overall grade291 students11 students per teacher
#5 Best Catholic Schools in the Diocese of Rockville Centre
St. Mary's High School
Parish school · Grades 9–12
The largest Catholic school in Manhasset
Manhasset, NY
A+Overall grade329 students13 students per teacher
#6 Best Catholic Schools in the Diocese of Rockville Centre
Sacred Heart Academy
Diocesan school · Grades 9–12
100% of graduates go to four-year colleges
Hempstead, NY
A+Overall gradeAll girls677 students14 students per teacher
#7 Best Catholic Schools in the Diocese of Rockville Centre
Notre Dame School
Diocesan school · Grades Pre-K–8
Serving families in New Hyde Park since at least 2011
New Hyde Park, NY
A+Overall grade267 students12 students per teacher
#8 Best Catholic Schools in the Diocese of Rockville Centre
St. Aidan Upper School
Parish school · Grades 3–8
Smaller classes than 92% of Catholic schools in New York
Williston Park, NY
A+Overall grade166 students6 students per teacher
#9 Best Catholic Schools in the Diocese of Rockville Centre
Our Lady of Guadalupe Catholic School
Diocesan school · Grades Pre-K–8
Growing: enrollment up 47% since 2011–12
Deer Park, NY
A+Overall grade380 students12 students per teacher
#10 Best Catholic Schools in the Diocese of Rockville Centre
Our Lady of Victory School
Parish school · Grades Pre-K–8
Serving families in Floral Park since at least 2011
Floral Park, NY
A+Overall grade279 students13 students per teacher
#11 Best Catholic Schools in the Diocese of Rockville Centre
St. Rose of Lima Elementary School
Parish school · Grades Pre-K–8
Smaller classes than 64% of Catholic schools in New York
Massapequa, NY
A+Overall grade250 students10 students per teacher
#12 Best Catholic Schools in the Diocese of Rockville Centre
St. Martin De Porres Marianist School
Independent Catholic school · Grades Pre-K–8
One of 2 Catholic schools in Uniondale
Uniondale, NY
AOverall grade298 students12 students per teacher
#13 Best Catholic Schools in the Diocese of Rockville Centre
St. John the Baptist Diocesan High School
Diocesan school · Grades 9–12
100% of graduates go to four-year colleges
West Islip, NY
AOverall grade969 students15 students per teacher
#14 Best Catholic Schools in the Diocese of Rockville Centre
St. John Paul II Regional School
Diocesan school · Grades Pre-K–8
Smaller classes than 83% of Catholic schools in New York
Riverhead, NY
AOverall grade147 students7 students per teacher
#15 Best Catholic Schools in the Diocese of Rockville Centre
SS Philip & James School
Diocesan school · Grades Pre-K–8
The only Catholic school in Saint James
Saint James, NY
AOverall grade126 students10 students per teacher
#16 Best Catholic Schools in the Diocese of Rockville Centre
St. Anne's School
Parish school · Grades Pre-K–8
Serving families in Garden City since at least 2011
Garden City, NY
A-Overall grade323 students14 students per teacher
#17 Best Catholic Schools in the Diocese of Rockville Centre
St. Dominic High School
Independent Catholic school · Grades 9–12
97% of graduates go to four-year colleges
Oyster Bay, NY
A-Overall grade280 students11 students per teacher
#18 Best Catholic Schools in the Diocese of Rockville Centre
Trinity Regional School-East Northport Campus
Diocesan school · Grades Pre-K–8
Serving families in East Northport since at least 2011
East Northport, NY
A-Overall grade253 students12 students per teacher
#19 Best Catholic Schools in the Diocese of Rockville Centre
St. Patrick's School
Parish school · Grades Pre-K–8
Smaller classes than 60% of Catholic schools in New York
Huntington, NY
A-Overall grade445 students11 students per teacher
#20 Best Catholic Schools in the Diocese of Rockville Centre
St. Patrick School
Diocesan school · Grades Pre-K–8
Serving families in Bay Shore since at least 2011
Bay Shore, NY
A-Overall grade395 students15 students per teacher
#21 Best Catholic Schools in the Diocese of Rockville Centre
Holy Angels Regional School
Diocesan school · Grades Pre-K–8
A Catholic school in Patchogue
Patchogue, NY
B+Overall grade191 students12 students per teacher
#22 Best Catholic Schools in the Diocese of Rockville Centre
St. Anthony's High School
Parish school · Grades 9–12
The only Catholic school in Huntington Station
Huntington Station, NY
B+Overall grade2,435 students19 students per teacher
#23 Best Catholic Schools in the Diocese of Rockville Centre
Our Lady of Lourdes School
Diocesan school · Grades Pre-K–8
Serving families in Malverne since at least 2011
Malverne, NY
B+Overall grade226 students12 students per teacher
#24 Best Catholic Schools in the Diocese of Rockville Centre
St. Marys High School
Parish school · Grades 9–12
The largest Catholic school in Manhasset
Manhasset, NY
B+Overall grade329 students13 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.