#1 Best Private Schools in Suffolk County, NY
Ross School
Independent school · Grades Pre-K–12
95% of graduates go to four-year colleges
East Hampton, NY
A+Overall grade286 students5 students per teacher
2026 lists
Best Private Schools in Suffolk County, NY
Private schools in Suffolk County, NY with the highest overall grades. Top 29 of 29 schools.
#2 Best Private Schools in Suffolk County, NY
Our Savior New American School
Lutheran (Missouri Synod) school · Grades Pre-K–12
Smaller classes than 84% of Christian schools in New York
Centereach, NY
A+Overall grade99 students4 students per teacher
#3 Best Private Schools in Suffolk County, NY
Long Island School for the Gifted
Independent school · Grades K–9
Small classes: about 6 students per teacher
Huntington Station, NY
A+Overall grade133 students6 students per teacher
#4 Best Private Schools in Suffolk County, NY
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 Private Schools in Suffolk County, NY
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
#6 Best Private Schools in Suffolk County, NY
MDQ Academy
Islamic school · Grades Pre-K–12
100% of graduates go to four-year colleges
Brentwood, NY
AOverall grade276 students9 students per teacher
#7 Best Private Schools in Suffolk County, NY
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
#8 Best Private Schools in Suffolk County, NY
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
#9 Best Private Schools in Suffolk County, NY
Victory Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
Smaller classes than 62% of Christian schools in New York
East Patchogue, NY
AOverall grade72 students6 students per teacher
#10 Best Private Schools in Suffolk County, NY
Love of Learning Montessori
Montessori school · Grades Pre-K–6
Small classes: about 5 students per teacher
Centerport, NY
AOverall grade65 students5 students per teacher
#11 Best Private Schools in Suffolk County, NY
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
#12 Best Private Schools in Suffolk County, NY
Bethesda SDA Junior Academy
Seventh-day Adventist school · Grades Pre-K–8
Small classes: about 7 students per teacher
Amityville, NY
AOverall grade61 students7 students per teacher
#13 Best Private Schools in Suffolk County, NY
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
#14 Best Private Schools in Suffolk County, NY
School House
Alternative school · Grades Pre-K–6
Smaller classes than 84% of independent schools in New York
East Northport, NY
A-Overall grade79 students4 students per teacher
#15 Best Private Schools in Suffolk County, NY
Harbor Country Day School
Independent school · Grades Pre-K–8
Growing: enrollment up 23% since 2013–14
Saint James, NY
A-Overall grade117 students6 students per teacher
#16 Best Private Schools in Suffolk County, NY
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
#17 Best Private Schools in Suffolk County, NY
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
#18 Best Private Schools in Suffolk County, NY
Holy Angels Regional School
Diocesan school · Grades Pre-K–8
A Catholic school in Patchogue
Patchogue, NY
B+Overall grade191 students12 students per teacher
#19 Best Private Schools in Suffolk County, NY
Peconic Community School
Independent school · Grades Pre-K–8
Growing: enrollment up 103% since 2015–16
Cutchogue, NY
B+Overall grade71 students6 students per teacher
#20 Best Private Schools in Suffolk County, NY
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
#21 Best Private Schools in Suffolk County, NY
The Knox School
Independent school · Grades 6–12
100% of graduates go to four-year colleges
Saint James, NY
B+Overall grade112 students24 students per teacher
#22 Best Private Schools in Suffolk County, NY
Ivy League School
Independent school · Grades Pre-K–8
The only independent school in Smithtown
Smithtown, NY
B+Overall grade84 students6 students per teacher
#23 Best Private Schools in Suffolk County, NY
Leonard E Burket Christian School
Assembly of God school · Grades Pre-K–12
Growing: enrollment up 27% since 2011–12
Center Moriches, NY
B+Overall grade81 students20 students per teacher
#24 Best Private Schools in Suffolk County, NY
The Stony Brook School
Christian school (nondenominational) · Grades 7–12
89% of graduates go to four-year colleges
Stony Brook, NY
B+Overall grade442 students10 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.