#1 Largest Private Schools in Slidell, LA
Pope John Paul II Catholic High School
Diocesan school · Grades 8–12
357 students
Slidell, LA
B+Overall grade357 students14 students per teacher
2026 lists
Largest Private Schools in Slidell, LA
The private schools in Slidell, LA with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Slidell, LA
Lake Castle Slidell Private School
Independent Catholic school · Grades Pre-K–8
336 students
Slidell, LA
B-Overall grade336 students16 students per teacher
#3 Largest Private Schools in Slidell, LA
Our Lady of Lourdes Elementary School
Diocesan school · Grades Pre-K–7
301 students
Slidell, LA
BOverall grade301 students15 students per teacher
#4 Largest Private Schools in Slidell, LA
First Baptist Christian School
Baptist school · Grades 1–12
278 students
Slidell, LA
B-Overall grade278 students15 students per teacher
#5 Largest Private Schools in Slidell, LA
Lakeside Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
154 students
Slidell, LA
A+Overall grade154 students6 students per teacher
#6 Largest Private Schools in Slidell, LA
Slidell Christian Academy
Christian school (nondenominational) · Grades Pre-K–6
24 students
Slidell, LA
AOverall grade24 students5 students per teacher
From official public records, updated October 2026.