#1 Best Catholic Schools in Nassau County, NY
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 Nassau County, NY
The highest-graded schools of this kind in Nassau County, NY. Top 19 of 19 schools.
#2 Best Catholic Schools in Nassau County, NY
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 Nassau County, NY
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 Nassau County, NY
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
#5 Best Catholic Schools in Nassau County, NY
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
#6 Best Catholic Schools in Nassau County, NY
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
#7 Best Catholic Schools in Nassau County, NY
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
#8 Best Catholic Schools in Nassau County, NY
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
#9 Best Catholic Schools in Nassau County, NY
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
#10 Best Catholic Schools in Nassau County, NY
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
#11 Best Catholic Schools in Nassau County, NY
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
#12 Best Catholic Schools in Nassau County, NY
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
#13 Best Catholic Schools in Nassau County, NY
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
#14 Best Catholic Schools in Nassau County, NY
St. Marys High School
Parish school · Grades 9–12
The largest Catholic school in Manhasset
Manhasset, NY
B+Overall grade329 students13 students per teacher
#15 Best Catholic Schools in Nassau County, NY
St. Elizabeth Ann Seton Regional School
Diocesan school · Grades Pre-K–8
Serving families in Bellmore since at least 2011
Bellmore, NY
B+Overall grade226 students15 students per teacher
#16 Best Catholic Schools in Nassau County, NY
St. Dominic Elementary School
Diocesan school · Grades Pre-K–8
Serving families in Oyster Bay since at least 2011
Oyster Bay, NY
B+Overall grade160 students13 students per teacher
#17 Best Catholic Schools in Nassau County, NY
Kellenberg Memorial High School
Independent Catholic school · Grades 6–12
The largest of 328 Catholic schools in New York
Uniondale, NY
BOverall grade2,692 students22 students per teacher
#18 Best Catholic Schools in Nassau County, NY
St. William the Abbot School
Parish school · Grades Pre-K–8
A Catholic school in Seaford
Seaford, NY
BOverall grade372 students13 students per teacher
#19 Best Catholic Schools in Nassau County, NY
Long Beach Catholic Regional School
Diocesan school · Grades Pre-K–8
The only Catholic school in Long Beach
Long Beach, NY
BOverall grade245 students15 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.