#1 Fastest-Growing Private Schools in St. Tammany Parish, LA
Archbishop Hannan High School
Diocesan school · Grades 8–12
Enrollment up 125% in about a decade
Covington, LA
B+Overall grade694 students15 students per teacher
2026 lists
Fastest-Growing Private Schools in St. Tammany Parish, LA
Private schools in St. Tammany Parish, LA whose enrollment has grown the most over the past decade. Top 5 of 5 schools.
#2 Fastest-Growing Private Schools in St. Tammany Parish, LA
Northlake Christian
Christian school (nondenominational) · Grades K–12
Enrollment up 48% in about a decade
Covington, LA
B-Overall grade922 students
#3 Fastest-Growing Private Schools in St. Tammany Parish, LA
First Baptist Christian School
Baptist school · Grades 1–12
Enrollment up 38% in about a decade
Slidell, LA
B-Overall grade278 students15 students per teacher
#4 Fastest-Growing Private Schools in St. Tammany Parish, LA
Christ Episcopal School
Episcopal school · Grades Pre-K–12
Enrollment up 21% in about a decade
Covington, LA
AOverall grade595 students9 students per teacher
#5 Fastest-Growing Private Schools in St. Tammany Parish, LA
Pope John Paul II Catholic High School
Diocesan school · Grades 8–12
Enrollment up 13% in about a decade
Slidell, LA
B+Overall grade357 students14 students per teacher
From official public records, updated October 2026.