#1 Largest Private Schools in San Antonio, TX
Cornerstone Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
2,098 students
San Antonio, TX
AOverall grade2,098 students14 students per teacher
2026 lists
Largest Private Schools in San Antonio, TX
The private schools in San Antonio, TX with the most students. Top 50 of 65 schools.
#2 Largest Private Schools in San Antonio, TX
Nobis Pacem
Independent Catholic school · Grades Pre-K–12
1,091 students
San Antonio, TX
B-Overall grade1,091 students21 students per teacher
#3 Largest Private Schools in San Antonio, TX
San Antonio Christian School
Christian school (nondenominational) · Grades Pre-K–12
878 students
San Antonio, TX
B-Overall grade878 students
#4 Largest Private Schools in San Antonio, TX
Antonian College Preparatory High School
Diocesan school · Grades 9–12
717 students
San Antonio, TX
A+Overall grade717 students12 students per teacher
#5 Largest Private Schools in San Antonio, TX
St. Mary's Hall
Independent school · Grades Pre-K–12
694 students
San Antonio, TX
A+Overall grade694 students8 students per teacher
#6 Largest Private Schools in San Antonio, TX
Tmi Episcopal
Episcopal school · Grades 6–12
595 students
San Antonio, TX
A+Overall grade595 students10 students per teacher
#7 Largest Private Schools in San Antonio, TX
The Christian School at Castle Hills
Christian school (nondenominational) · Grades Pre-K–12
565 students
San Antonio, TX
BOverall grade565 students12 students per teacher
#8 Largest Private Schools in San Antonio, TX
St. Matthew Catholic School
Diocesan school · Grades Pre-K–8
550 students
San Antonio, TX
B+Overall grade550 students14 students per teacher
#9 Largest Private Schools in San Antonio, TX
St. George Episcopal School
Episcopal school · Grades Pre-K–8
507 students
San Antonio, TX
B+Overall grade507 students12 students per teacher
#10 Largest Private Schools in San Antonio, TX
Central Catholic High School -San Antonio
Independent Catholic school · Grades 9–12
504 students
San Antonio, TX
BOverall gradeAll boys504 students15 students per teacher
#11 Largest Private Schools in San Antonio, TX
Keystone School
Independent school · Grades Pre-K–12
419 students
San Antonio, TX
A+Overall grade419 students8 students per teacher
#12 Largest Private Schools in San Antonio, TX
St. Luke Catholic School
Parish school · Grades Pre-K–8
413 students
San Antonio, TX
BOverall grade413 students13 students per teacher
#13 Largest Private Schools in San Antonio, TX
Holy Spirit Catholic School
Parish school · Grades Pre-K–8
368 students
San Antonio, TX
B+Overall grade368 students12 students per teacher
#14 Largest Private Schools in San Antonio, TX
Holy Spirit School
Parish school · Grades Pre-K–8
363 students
San Antonio, TX
BOverall grade363 students10 students per teacher
#15 Largest Private Schools in San Antonio, TX
Incarnate Word High School
Independent Catholic school · Grades 9–12
318 students
San Antonio, TX
A-Overall gradeAll girls318 students13 students per teacher
#16 Largest Private Schools in San Antonio, TX
Concordia Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
311 students
San Antonio, TX
B+Overall grade311 students9 students per teacher
#17 Largest Private Schools in San Antonio, TX
The Atonement Catholic Academy
Diocesan school · Grades Pre-K–12
306 students
San Antonio, TX
A+Overall grade306 students9 students per teacher
#18 Largest Private Schools in San Antonio, TX
Holy Cross of San Antonio
Independent Catholic school · Grades 6–12
300 students
San Antonio, TX
B-Overall grade300 students15 students per teacher
#19 Largest Private Schools in San Antonio, TX
San Antonio Academy of Texas
Independent school · Grades Pre-K–8
295 students
San Antonio, TX
B+Overall gradeAll boys295 students8 students per teacher
#20 Largest Private Schools in San Antonio, TX
The Montessori School of San Antonio
Montessori school · Grades Pre-K–8
270 students
San Antonio, TX
A-Overall grade270 students10 students per teacher
#21 Largest Private Schools in San Antonio, TX
St. Anthony Catholic High School
Independent Catholic school · Grades 9–12
241 students
San Antonio, TX
B+Overall grade241 students10 students per teacher
#22 Largest Private Schools in San Antonio, TX
Victory Learning Center
Independent school · Grades 9–12
220 students
San Antonio, TX
B-Overall grade220 students39 students per teacher
#23 Largest Private Schools in San Antonio, TX
St. Lukes Episcopal School
Episcopal school · Grades Pre-K–8
204 students
San Antonio, TX
A+Overall grade204 students8 students per teacher
#24 Largest Private Schools in San Antonio, TX
Providence Catholic School
Independent Catholic school · Grades 6–12
203 students
San Antonio, TX
A+Overall gradeAll girls203 students9 students per teacher
From official public records, updated October 2026.