#1 Most Diverse Private Schools in Suffolk County, NY
Developmental Disabilities Institute Huntington
Special education school · Ungraded
Largest group: 37% of students
Huntington, NY
BOverall grade123 students8 students per teacher
2026 lists
Most Diverse Private Schools in Suffolk County, NY
Private schools in Suffolk County, NY with the most varied mix of students. Top 32 of 32 schools.
#2 Most Diverse Private Schools in Suffolk County, NY
Our Savior New American School
Lutheran (Missouri Synod) school · Grades Pre-K–12
Largest group: 43% of students
Centereach, NY
A+Overall grade99 students4 students per teacher
#3 Most Diverse Private Schools in Suffolk County, NY
Ross School
Independent school · Grades Pre-K–12
Largest group: 49% of students
East Hampton, NY
A+Overall grade286 students5 students per teacher
#4 Most Diverse Private Schools in Suffolk County, NY
Smithtown Christian School
Christian school (nondenominational) · Grades K–12
Largest group: 50% of students
Smithtown, NY
B-Overall grade385 students10 students per teacher
#5 Most Diverse Private Schools in Suffolk County, NY
Long Island School for the Gifted
Independent school · Grades K–9
Largest group: 50% of students
Huntington Station, NY
A+Overall grade133 students6 students per teacher
#6 Most Diverse Private Schools in Suffolk County, NY
The Knox School
Independent school · Grades 6–12
Largest group: 50% of students
Saint James, NY
B+Overall grade112 students24 students per teacher
#7 Most Diverse Private Schools in Suffolk County, NY
Leonard E Burket Christian School
Assembly of God school · Grades Pre-K–12
Largest group: 51% of students
Center Moriches, NY
B+Overall grade81 students20 students per teacher
#8 Most Diverse Private Schools in Suffolk County, NY
St. Anthony's High School
Parish school · Grades 9–12
Largest group: 54% of students
Huntington Station, NY
B+Overall grade2,435 students19 students per teacher
#9 Most Diverse Private Schools in Suffolk County, NY
South Bay Jr. Academy of SDA
Seventh-day Adventist school · Grades Pre-K–8
Largest group: 54% of students
Babylon, NY
AOverall grade52 students8 students per teacher
#10 Most Diverse Private Schools in Suffolk County, NY
St. Patrick School
Diocesan school · Grades Pre-K–8
Largest group: 55% of students
Bay Shore, NY
A-Overall grade395 students15 students per teacher
#11 Most Diverse Private Schools in Suffolk County, NY
Our Lady of Guadalupe Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 57% of students
Deer Park, NY
A+Overall grade380 students12 students per teacher
#12 Most Diverse Private Schools in Suffolk County, NY
Our Lady of the Hamptons Regional Catholic School
Parish school · Grades Pre-K–8
Largest group: 57% of students
Southampton, NY
A+Overall grade291 students11 students per teacher
#13 Most Diverse Private Schools in Suffolk County, NY
Holy Angels Regional School
Diocesan school · Grades Pre-K–8
Largest group: 60% of students
Patchogue, NY
B+Overall grade191 students12 students per teacher
#14 Most Diverse Private Schools in Suffolk County, NY
Victory Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
Largest group: 60% of students
East Patchogue, NY
AOverall grade72 students6 students per teacher
#15 Most Diverse Private Schools in Suffolk County, NY
The Stony Brook School
Christian school (nondenominational) · Grades 7–12
Largest group: 62% of students
Stony Brook, NY
B+Overall grade442 students10 students per teacher
#16 Most Diverse Private Schools in Suffolk County, NY
Harbor Country Day School
Independent school · Grades Pre-K–8
Largest group: 62% of students
Saint James, NY
A-Overall grade117 students6 students per teacher
#17 Most Diverse Private Schools in Suffolk County, NY
Bay Shore Christian School
Assembly of God school · Grades K–6
Largest group: 62% of students
Bay Shore, NY
BOverall grade71 students12 students per teacher
#18 Most Diverse Private Schools in Suffolk County, NY
Cleary School for the Deaf
Independent Catholic school · Grades Pre-K–12
Largest group: 62% of students
Nesconset, NY
A+Overall grade50 students3 students per teacher
#19 Most Diverse Private Schools in Suffolk County, NY
St. John the Baptist Diocesan High School
Diocesan school · Grades 9–12
Largest group: 67% of students
West Islip, NY
AOverall grade969 students15 students per teacher
#20 Most Diverse Private Schools in Suffolk County, NY
Ivy League School
Independent school · Grades Pre-K–8
Largest group: 68% of students
Smithtown, NY
B+Overall grade84 students6 students per teacher
#21 Most Diverse Private Schools in Suffolk County, NY
Love of Learning Montessori
Montessori school · Grades Pre-K–6
Largest group: 77% of students
Centerport, NY
AOverall grade65 students5 students per teacher
#22 Most Diverse Private Schools in Suffolk County, NY
St. Patrick Elementary School
Diocesan school · Grades Pre-K–8
Largest group: 78% of students
Smithtown, NY
BOverall grade379 students15 students per teacher
#23 Most Diverse Private Schools in Suffolk County, NY
MDQ Academy
Islamic school · Grades Pre-K–12
Largest group: 79% of students
Brentwood, NY
AOverall grade276 students9 students per teacher
#24 Most Diverse Private Schools in Suffolk County, NY
St. Mary School
Parish school · Grades K–8
Largest group: 80% of students
East Islip, NY
BOverall grade331 students16 students per teacher
From official public records, updated October 2026.