Private School Review - Established 2003
Northlake Christian School Top 3 · Highest Avg. ACT Score (LA)
Christ Episcopal School Top 3 · Largest Endowment (LA)
Archbishop Hannan High School Top 17 · Most AP Courses (LA)

Best St. Tammany Parish Private High Schools (2026-27)

For the 2026-27 school year, there are 9 private high schools serving 4,448 students in St. Tammany Parish, LA.
The average acceptance rate is 92%, which is higher than the Louisiana private high school average acceptance rate of 80%.
100% of private high schools in St. Tammany Parish, LA are religiously affiliated (most commonly Catholic and Christian).

Quick Facts (2026-27)

  • # Private Schools: 9
  • # Students Served: 4,448
  • Average Tuition: $10,222
  • % Students on Financial Aid: 33%
  • Acceptance Rate: 92%
  • Average Class Size: 19 students
  • % Students of Color: 13%
  • View St. Tammany Parish, LA School Trends

Quick Facts (2026-27)

  • # Private Schools: 9
  • # Students Served: 4,448
  • Average Tuition: $10,222
  • % Students on Financial Aid: 33%
  • Acceptance Rate: 92%
  • Average Class Size: 19 students
  • % Students of Color: 13%
  • View St. Tammany Parish, LA School Trends

Top Ranked St. Tammany Parish Private High Schools (2026-27)

Archbishop Hannan High School Photo
Archbishop Hannan High School
Gr: 8-12 | 670 students
Avg. class size: 21 students
Sports: 19 | Extracurriculars: 30
Catholic
71324 Highway 1077
Covington, LA 70433
(985) 249-6363
View Profile
Map of Christ Episcopal School
Christ Episcopal School
Gr: PK-12 | 603 students
Avg. class size: 18 students
Sports: 15 | Extracurriculars: 4
Alternative School (Episcopal)
80 Christwood Blvd
Covington, LA 70433
(985) 871-9902
(3)
View Profile
Map of First Baptist Christian School
First Baptist Christian School
Gr: 1-12 | 270 students
Avg. class size: 19 students
Sports: 9 | Extracurriculars: 5
Baptist
4141 Pontchartrain Drive
Slidell, LA 70458
(985) 643-3725
(6)
View Profile
Northlake Christian School Photo
Northlake Christian School
Gr: PK-12 | 1,049 students
Avg. class size: 18 students
Sports: 14 | Extracurriculars: 8
Christian
70104 Wolverine Drive
Covington, LA 70433
(985) 635-0508
(4)
View Profile
Map of St. Pauls High School
St. Pauls High School
Gr: 8-12 | 867 students
All-boys (Catholic)
917 S Jahncke Ave
Covington, LA 70433
(985) 892-3200
(2)
View Profile
Map of St. Scholastica Academy
St. Scholastica Academy
Gr: 8-12 | 553 students
Avg. class size: 19 students
All-girls (Catholic)
122 S. Massachusetts
Covington, LA 70433
(985) 892-2540
View Profile
Map of Harvest Christian Academy
Harvest Christian Academy
Gr: 1-12 | 13 students
Christian
37291 W Pinehill Dr
Slidell, LA 70460
(985) 640-0601
(1)
View Profile
Map of Lakeside Christian Academy
Lakeside Christian Academy
Gr: PK-12 | 100 students
3401 Ponchartrain Dr
Slidell, LA 70458
(985) 781-3175
View Profile
Pope John Paul Ii Catholic High School Photo
Pope John Paul Ii Catholic High School
Gr: 8-12 | 323 students
Avg. class size: 18 students
Sports: 14 | Extracurriculars: 22
Catholic
1901 Jaguar Dr
Slidell, LA 70461
(985) 649-0914
(1)
View Profile
[+] Show Closed Private Schools in St. Tammany Parish, Louisiana

St. Tammany Parish Private High Schools (Closed)

Map of New Directions Alternative School
New Directions Alternative School
Gr: 8-12 | 10 students
All-boys | Alternative School
201 Greenbriar Blvd
Covington, LA 70433
(985) 893-2970
View Profile
Map of Northminster Montessori Preschool & Kindergarten
Northminster Montessori Preschool & Kindergarten
Gr: PK-K | 12 students
Montessori School (Presbyterian)
63140 Highway 1090
Pearl River, LA 70452
(985) 863-0800
View Profile
Map of Slidell Christian Academy
Slidell Christian Academy
Gr: PK-8
59334 N Pearl Dr
Slidell, LA 70461
(985) 641-3785
View Profile
Map of Slidell SDA School
Slidell SDA School
Gr: 2-7 | 3 students
Seventh Day Adventist
Po Box 753
Slidell, LA 70459
(985) 641-5792
View Profile

Overview

Category
This State (LA)
US
# Schools
9 Schools

Trends in Total Number of Private High Schools

YearSt. Tammany Parish Total Schools
20259
20249
20239
20228
20219
20209
20199
20189
20178
20168
20158
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# Students
4,448 Students
61,956 Students

Trends in the Average Number of Students Per Private High School

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
2025498364253
2024521359245
2023509355247
2022499390257
2021440388249
2020436370235
2019452376242
2018452371238
2017519395246
2016498391241
2015491361220
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% Average Students of Color
13%
21%

Percentage of Students of Color Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
202512%21%32%
20249%21%31%
202313%21%31%
20229%19%30%
20219%19%30%
20207%18%29%
20196%19%29%
20186%19%28%
20177%21%30%
20166%22%30%
20156%23%30%
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Academics and Faculty:

# Teachers
411 Teachers
5,636 Teachers
Average Student-Teacher Ratio
11:1
11:1

Student-Teacher Ratio Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
202511:111:110:1
202411:111:110:1
202312:111:110:1
202212:112:110:1
202112:112:110:1
202012:112:110:1
201912:112:110:1
201812:112:110:1
201712:113:110:1
201612:113:110:1
201513:113:110:1
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% Average Faculty w/Advanced Degree
59%
48%

Percentage of Faculty With Advanced Degrees Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
202560%45%57%
202460%44%57%
202360%43%57%
202260%43%56%
202160%44%56%
202060%43%56%
201960%44%55%
201860%43%55%
201760%42%55%
201647%42%54%
201547%39%54%
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Average Class Size
19 students
16 students

Class Size Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
2025181614
2024181614
2023181614
2022181614
2021191614
2020191614
2019191614
2018191614
2017191614
2016201714
2015211714
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Average Number of AP Courses
15 courses
11 courses

Trends in Average Number of AP Courses Offered

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
2025151113
2024111012
202311912
2022111012
2021111012
2020111012
2019111011
201891011
20179911
20168811
20154710
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Average ACT score
25
(Out of 36)
25

ACT Score Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
2025252526
2024252526
2023252526
2022242526
2021232526
2020232526
2019232525
2018232425
2017232525
2016232425
2015232425
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Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$10,222
$11,032

Tuition Cost Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
2025$10,159$11,114$17,997
2024$9,203$9,041$17,011
2023$9,269$9,400$16,191
2022$7,946$8,901$15,821
2021$7,733$8,615$15,331
2020$7,683$8,115$15,046
2019$7,630$7,874$14,791
2018$7,434$7,576$14,527
2017$7,388$6,935$14,161
2016$6,785$6,276$13,713
2015$6,660$5,914$13,065
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Average % on Financial Aid
33%
20%

Percent on Financial Aid Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
202530%20%38%
202428%20%37%
202328%20%36%
202228%20%36%
202128%20%36%
202028%18%35%
201928%18%34%
201828%18%33%
201728%18%32%
201616%17%31%
201516%18%30%
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Average Financial Aid Grant
$2,000
$1,931

Financial Aid Grant Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
2025$1,667$1,872$9,714
2024$1,667$1,872$9,498
2023$1,667$2,308$8,890
2022$1,667$2,308$8,717
2021$1,667$2,202$8,472
2020$1,667$2,262$8,370
2019$1,667$2,256$7,924
2018$1,667$1,692$7,471
2017$1,667$1,692$7,202
2016$1,833$1,874$6,993
2015$2,000$2,086$6,822
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Average Acceptance Rate
92%
80%

Acceptance Rate Trends (2015-2025)

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
202592%80%79%
202492%82%81%
202392%83%81%
202294%84%81%
202194%83%81%
202094%83%81%
201994%83%81%
201894%83%80%
201794%84%81%
201693%84%80%
201593%84%81%
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Average Endowment Size
$50 million
$36 million

Students by Ethnicity:

0.45
0.49

Diversity Score Trends

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
20250.450.490.61
20240.480.490.60
20230.480.480.60
20220.370.440.58
20210.360.440.57
20200.350.440.57
20190.400.450.56
20180.400.450.55
20170.380.430.54
20160.340.430.54
20150.330.430.53
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# American Indian Students
20 Students
298 Students
% American Indian Students
1%
1%
# Asian Students
62 Students
1,411 Students
% Asian Students
1%
2%

Asian Student Percentage Trends

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
20251%3%5%
20242%3%6%
20232%3%6%
20221%3%5%
20211%2%5%
20201%3%5%
20191%3%5%
20181%3%5%
20171%2%4%
20161%2%4%
20151%2%4%
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# Hispanic Students
99 Students
1,815 Students
% Hispanic Students
2%
3%

Hispanic Student Percentage Trends

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
20252%3%9%
20242%3%9%
20232%3%8%
20222%2%8%
20212%3%8%
20202%2%8%
20192%2%8%
20182%2%8%
20172%2%7%
20162%2%8%
20152%2%8%
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# Black Students
113 Students
7,884 Students
% Black Students
3%
13%

Black Student Percentage Trends

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
20253%13%8%
20242%13%8%
20233%13%8%
20223%11%8%
20213%11%8%
20203%11%8%
20193%12%8%
20183%12%8%
20172%12%8%
20163%12%8%
20153%13%9%
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# White Students
3,187 Students
43,615 Students
% White Students
71%
69%

White Student Percentage Trends

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
202571%69%59%
202468%69%60%
202367%70%60%
202278%74%62%
202179%74%63%
202080%74%64%
201975%73%64%
201875%73%65%
201777%74%66%
201680%74%66%
201581%74%66%
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# Hawaiian Students
1 Student
131 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
986 Students
7,782 Students
% of Others Students
22%
12%

Other Races Student Percentage Trends

YearSt. Tammany Parish AverageLouisiana (LA) AverageNational Average
202523%12%17%
202426%12%15%
202326%11%16%
202216%10%16%
202115%10%15%
202014%10%14%
201919%10%14%
201819%10%13%
201718%10%14%
201614%10%13%
201513%9%12%
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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
14 extracurriculars
14 extracurriculars
Average Number of Sports
14 sports
11 sports

Frequently Asked Questions

What are the top ranked private high schools in St. Tammany Parish, LA?
The top ranked private high schools in St. Tammany Parish, LA include St. Scholastica Academy, Northlake Christian School, and Christ Episcopal School.
How many private high schools are located in St. Tammany Parish?
9 private high schools are located in St. Tammany Parish.
How diverse are private high schools in St. Tammany Parish?
St. Tammany Parish private high schools are approximately 13% minority students, which is lower than the Louisiana private school average of 21%.
What percentage of private high schools are religiously affiliated in St. Tammany Parish?
100% of private high schools in St. Tammany Parish are religiously affiliated (most commonly Catholic and Christian).
Which private high schools in St. Tammany Parish are often viewed compared to one another?

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