#1 Most Diverse Private Schools in St. Tammany Parish, LA
Lakeside Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
Largest group: 36% of students
Slidell, LA
A+Overall grade154 students6 students per teacher
2026 lists
Most Diverse Private Schools in St. Tammany Parish, LA
Private schools in St. Tammany Parish, LA with the most varied mix of students. Top 13 of 13 schools.
#2 Most Diverse Private Schools in St. Tammany Parish, LA
Northlake Christian
Christian school (nondenominational) · Grades K–12
Largest group: 54% of students
Covington, LA
B-Overall grade922 students
#3 Most Diverse Private Schools in St. Tammany Parish, LA
Our Lady of Lourdes Elementary School
Diocesan school · Grades Pre-K–7
Largest group: 70% of students
Slidell, LA
BOverall grade301 students15 students per teacher
#4 Most Diverse Private Schools in St. Tammany Parish, LA
Lake Castle Slidell Private School
Independent Catholic school · Grades Pre-K–8
Largest group: 71% of students
Slidell, LA
B-Overall grade336 students16 students per teacher
#5 Most Diverse Private Schools in St. Tammany Parish, LA
First Baptist Christian School
Baptist school · Grades 1–12
Largest group: 77% of students
Slidell, LA
B-Overall grade278 students15 students per teacher
#6 Most Diverse Private Schools in St. Tammany Parish, LA
Pope John Paul II Catholic High School
Diocesan school · Grades 8–12
Largest group: 81% of students
Slidell, LA
B+Overall grade357 students14 students per teacher
#7 Most Diverse Private Schools in St. Tammany Parish, LA
Archbishop Hannan High School
Diocesan school · Grades 8–12
Largest group: 86% of students
Covington, LA
B+Overall grade694 students15 students per teacher
#8 Most Diverse Private Schools in St. Tammany Parish, LA
Cedarwood School
Independent school · Grades Pre-K–7
Largest group: 86% of students
Mandeville, LA
BOverall grade138 students7 students per teacher
#9 Most Diverse Private Schools in St. Tammany Parish, LA
Mary Queen of Peace Catholic School
Diocesan school · Grades Pre-K–7
Largest group: 88% of students
Mandeville, LA
B-Overall grade350 students19 students per teacher
#10 Most Diverse Private Schools in St. Tammany Parish, LA
St. Pauls High School
Independent Catholic school · Grades 8–12
Largest group: 89% of students
Covington, LA
AOverall gradeAll boys865 students13 students per teacher
#11 Most Diverse Private Schools in St. Tammany Parish, LA
Christ Episcopal School
Episcopal school · Grades Pre-K–12
Largest group: 92% of students
Covington, LA
AOverall grade595 students9 students per teacher
#12 Most Diverse Private Schools in St. Tammany Parish, LA
St. Peter Catholic School
Diocesan school · Grades Pre-K–7
Largest group: 93% of students
Covington, LA
B-Overall grade706 students17 students per teacher
#13 Most Diverse Private Schools in St. Tammany Parish, LA
St. Scholastica Academy
Diocesan school · Grades 8–12
Largest group: 93% of students
Covington, LA
AOverall gradeAll girls538 students14 students per teacher
From official public records, updated October 2026.