#1 Largest Private Schools in Albany County, NY
Albany Academies
Independent school · Grades Pre-K–12
620 students
Albany, NY
BOverall grade620 students8 students per teacher
2026 lists
Largest Private Schools in Albany County, NY
The private schools in Albany County, NY with the most students. Top 25 of 25 schools.
#2 Largest Private Schools in Albany County, NY
St. Pius X School
Diocesan school · Grades Pre-K–8
355 students
Albany, NY
B-Overall grade355 students14 students per teacher
#3 Largest Private Schools in Albany County, NY
St. Pius X
Parish school · Grades Pre-K–8
355 students
Loudonville, NY
A-Overall grade355 students6 students per teacher
#4 Largest Private Schools in Albany County, NY
Catholic Central School
Diocesan school · Grades Pre-K–12
212 students
Latham, NY
A+Overall grade212 students6 students per teacher
#5 Largest Private Schools in Albany County, NY
Academy of the Holy Names
Independent Catholic school · Grades 6–12
210 students
Albany, NY
A+Overall gradeAll girls210 students10 students per teacher
#6 Largest Private Schools in Albany County, NY
Annur Islamic School
Islamic school · Grades Pre-K–12
204 students
Schenectady, NY
A+Overall grade204 students9 students per teacher
#7 Largest Private Schools in Albany County, NY
Loudonville Christian School
Christian school (nondenominational) · Grades Pre-K–12
160 students
Loudonville, NY
B+Overall grade160 students7 students per teacher
#8 Largest Private Schools in Albany County, NY
All Saints Catholic Academy
Parish school · Grades Pre-K–8
159 students
Albany, NY
A+Overall grade159 students11 students per teacher
#9 Largest Private Schools in Albany County, NY
St. Thomas the Apostle School
Parish school · Grades Pre-K–8
142 students
Delmar, NY
AOverall grade142 students11 students per teacher
#10 Largest Private Schools in Albany County, NY
Neil Hellman School/Northern Rivers Family Service
Special education school · Grades 3–12
138 students
Albany, NY
BOverall grade138 students5 students per teacher
#11 Largest Private Schools in Albany County, NY
Our Savior's Christian School
Christian school (nondenominational) · Grades Pre-K–8
133 students
Albany, NY
BOverall grade133 students12 students per teacher
#12 Largest Private Schools in Albany County, NY
Mater Christi School
Diocesan school · Grades Pre-K–8
111 students
Albany, NY
A+Overall grade111 students6 students per teacher
#13 Largest Private Schools in Albany County, NY
St. Gregorys School
Independent Catholic school · Grades Pre-K–8
104 students
Loudonville, NY
A+Overall grade104 students6 students per teacher
#14 Largest Private Schools in Albany County, NY
Blessed Sacrament School
Diocesan school · Grades Pre-K–8
94 students
Albany, NY
A+Overall grade94 students5 students per teacher
#15 Largest Private Schools in Albany County, NY
St. Madeleine Sophie School
Independent Catholic school · Grades Pre-K–5
93 students
Schenectady, NY
B+Overall grade93 students16 students per teacher
#16 Largest Private Schools in Albany County, NY
Maimonides Hebrew Day School
Jewish day school · Grades Pre-K–12
92 students
Albany, NY
AOverall grade92 students6 students per teacher
#17 Largest Private Schools in Albany County, NY
Lasalle School
Independent Catholic school · Grades 7–12
56 students
Albany, NY
AOverall gradeAll boys56 students4 students per teacher
#18 Largest Private Schools in Albany County, NY
St. Catherine's CTR for Children R & E May School
Special education school · Grades K–6
52 students
Albany, NY
AOverall grade52 students5 students per teacher
#19 Largest Private Schools in Albany County, NY
Hebrew Academy of the Capital District
Jewish day school · Grades K–8
51 students
Albany, NY
AOverall grade51 students5 students per teacher
#20 Largest Private Schools in Albany County, NY
St. Anne Institute
Special education school · Grades 7–12
38 students
Albany, NY
AOverall gradeAll girls38 students3 students per teacher
#21 Largest Private Schools in Albany County, NY
St. Colman's School
Special education school · Grades K–9
37 students
Watervliet, NY
AOverall grade37 students2 students per teacher
#22 Largest Private Schools in Albany County, NY
Helderberg Christian School
Christian school (nondenominational) · Grades K–12
34 students
East Berne, NY
AOverall grade34 students5 students per teacher
#23 Largest Private Schools in Albany County, NY
River Run Community Montessori
Montessori school · Grades Pre-K–6
23 students
Schenectady, NY
AOverall grade23 students4 students per teacher
#24 Largest Private Schools in Albany County, NY
Castle Island Bilingual Montessori
Montessori school · Grades Pre-K–4
21 students
Albany, NY
AOverall grade21 students3 students per teacher
From official public records, updated October 2026.