[+] Show Closed Private Schools in St. Tammany Parish, Louisiana

St. Tammany Parish Private Schools (Closed)

New Directions Alternative School

Gr: 8-12 | 10 students

All-boys | Alternative School

201 Greenbriar Blvd

Covington, LA 70433

(985) 893-2970

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Northminster Montessori Preschool & Kindergarten

Gr: PK-K | 12 students

Montessori School (Presbyterian)

63140 Highway 1090

Pearl River, LA 70452

(985) 863-0800

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Slidell Christian Academy

Gr: PK-8

59334 N Pearl Dr

Slidell, LA 70461

(985) 641-3785

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Slidell SDA School

Gr: 2-7 | 3 students

Seventh Day Adventist

Po Box 753

Slidell, LA 70459

(985) 641-5792

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Overview

Academics and Faculty:

# Teachers

781 Teachers

9,824 Teachers

Average Student-Teacher Ratio

13:1

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Student-Teacher Ratio Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	13:1	13:1	11:1
2024	13:1	13:1	11:1
2023	13:1	12:1	11:1
2022	13:1	13:1	11:1
2021	13:1	13:1	11:1
2020	13:1	13:1	12:1
2019	14:1	13:1	12:1
2018	14:1	13:1	12:1
2017	14:1	14:1	12:1
2016	14:1	14:1	12:1
2015	15:1	14:1	12:1

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% Average Faculty w/Advanced Degree

52%

42%

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Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	52%	40%	55%
2024	50%	40%	54%
2023	54%	39%	54%
2022	54%	39%	54%
2021	54%	39%	54%
2020	54%	39%	54%
2019	56%	39%	53%
2018	60%	39%	53%
2017	60%	39%	53%
2016	47%	40%	52%
2015	47%	40%	52%

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Average Class Size

18 students

17 students

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Class Size Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	18	17	15
2024	18	17	15
2023	17	17	15
2022	17	17	15
2021	17	17	15
2020	19	17	15
2019	19	17	15
2018	19	18	15
2017	19	17	15
2016	19	18	15
2015	20	18	15

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Average Number of AP Courses

15 courses

10 courses

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Trends in Average Number of AP Courses Offered
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	15	11	13
2024	11	9	12
2023	11	9	11
2022	11	9	11
2021	11	9	11
2020	11	9	11
2019	11	9	11
2018	9	8	11
2017	9	8	10
2016	8	8	10
2015	4	7	10

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Average ACT score

(Out of 36)

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ACT Score Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	25	25	26
2024	25	25	26
2023	25	25	26
2022	24	25	26
2021	23	25	26
2020	23	25	25
2019	23	25	25
2018	23	24	25
2017	23	25	25
2016	23	24	25
2015	23	24	25

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Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$8,969

$9,639

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Tuition Cost Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	$8,938	$9,739	$15,012
2024	$8,048	$7,776	$13,254
2023	$7,065	$7,710	$12,626
2022	$6,357	$7,319	$12,187
2021	$6,225	$7,128	$11,800
2020	$6,103	$6,793	$11,512
2019	$6,601	$6,706	$11,293
2018	$6,395	$6,545	$11,017
2017	$6,365	$6,305	$10,708
2016	$5,910	$5,949	$10,356
2015	$5,826	$5,440	$9,939

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Average Summer Program Cost

$550

$344

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Summer Program Cost Trends (2023-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	$550	$328	$1,152
2023	$145	$320	$1,156

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Average % on Financial Aid

33%

23%

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Percent on Financial Aid Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	30%	22%	34%
2024	28%	22%	34%
2023	28%	22%	34%
2022	28%	22%	33%
2021	28%	22%	33%
2020	28%	18%	32%
2019	28%	20%	31%
2018	28%	19%	30%
2017	28%	17%	30%
2016	16%	18%	29%
2015	16%	19%	28%

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Average Financial Aid Grant

$2,000

$2,025

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Financial Aid Grant Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	$1,667	$2,060	$7,073
2024	$1,667	$1,972	$6,930
2023	$1,667	$2,161	$6,469
2022	$1,667	$2,160	$6,289
2021	$1,667	$2,098	$6,055
2020	$1,667	$2,148	$5,921
2019	$1,667	$2,092	$5,795
2018	$1,667	$1,814	$5,456
2017	$1,667	$1,732	$5,319
2016	$1,833	$1,707	$5,105
2015	$2,000	$1,572	$5,030

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Average Acceptance Rate

91%

85%

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Acceptance Rate Trends (2015-2025)
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	91%	84%	81%
2024	91%	87%	85%
2023	93%	88%	85%
2022	94%	89%	85%
2021	94%	88%	85%
2020	94%	88%	85%
2019	94%	88%	85%
2018	94%	87%	85%
2017	94%	87%	85%
2016	93%	87%	85%
2015	93%	86%	85%

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Average Endowment Size

$50 million

$42.93 million

Students by Ethnicity:

0.48

0.55

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Diversity Score Trends
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	0.48	0.55	0.65
2024	0.50	0.55	0.65
2023	0.50	0.54	0.65
2022	0.44	0.51	0.64
2021	0.43	0.52	0.64
2020	0.43	0.52	0.64
2019	0.43	0.52	0.63
2018	0.43	0.52	0.63
2017	0.38	0.48	0.61
2016	0.36	0.48	0.61
2015	0.36	0.48	0.61

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# American Indian Students

21 Students

466 Students

% American Indian Students

n/a

# Asian Students

172 Students

3,141 Students

% Asian Students

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Asian Student Percentage Trends
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	2%	4%	5%
2024	2%	4%	5%
2023	1%	3%	5%
2022	1%	3%	4%
2021	1%	2%	4%
2020	2%	2%	4%
2019	1%	3%	4%
2018	1%	3%	4%
2017	1%	3%	4%
2016	1%	2%	4%
2015	1%	2%	4%

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# Hispanic Students

203 Students

4,025 Students

% Hispanic Students

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Hispanic Student Percentage Trends
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	2%	3%	9%
2024	2%	3%	9%
2023	2%	3%	9%
2022	2%	3%	8%
2021	2%	3%	9%
2020	2%	3%	9%
2019	2%	3%	8%
2018	2%	3%	8%
2017	1%	2%	8%
2016	1%	2%	8%
2015	1%	2%	8%

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# Black Students

272 Students

13,988 Students

% Black Students

11%

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Black Student Percentage Trends
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	3%	11%	7%
2024	3%	12%	7%
2023	3%	13%	8%
2022	3%	12%	7%
2021	3%	12%	7%
2020	3%	12%	8%
2019	3%	12%	7%
2018	3%	13%	7%
2017	3%	11%	7%
2016	3%	12%	7%
2015	3%	12%	8%

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# White Students

6,567 Students

79,143 Students

% White Students

68%

64%

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White Student Percentage Trends
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	68%	64%	52%
2024	65%	63%	52%
2023	65%	64%	52%
2022	72%	67%	54%
2021	73%	67%	54%
2020	73%	67%	54%
2019	73%	67%	56%
2018	73%	67%	56%
2017	77%	70%	58%
2016	78%	70%	58%
2015	78%	70%	58%

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# Hawaiian Students

2 Students

182 Students

% Hawaiian Students

n/a

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

2,454 Students

22,503 Students

% of Others Students

25%

18%

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Other Races Student Percentage Trends
Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	25%	18%	26%
2024	28%	18%	26%
2023	29%	17%	25%
2022	22%	15%	25%
2021	21%	16%	25%
2020	20%	16%	24%
2019	21%	15%	24%
2018	21%	14%	23%
2017	18%	14%	22%
2016	17%	14%	22%
2015	17%	14%	21%

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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars

11 extracurriculars

10 extracurriculars

Average Number of Sports

11 sports

9 sports

Frequently Asked Questions

What are the top ranked private schools in St. Tammany Parish, LA?

The private schools in St. Tammany Parish, LA include Northlake Christian School, St. Scholastica Academy, and St. Pauls High School.

How many private schools are located in St. Tammany Parish?

26 private schools are located in St. Tammany Parish.

How much do private schools cost in St. Tammany Parish?

The average tuition cost is $8,969, which is lower than the Louisiana private school average tuition cost of $9,639.

How diverse are private schools in St. Tammany Parish?

St. Tammany Parish private schools are approximately 12% minority students, which is lower than the Louisiana private school average of 22%.

What percentage of students in St. Tammany Parish go to private school?

20% of all K-12 students in St. Tammany Parish are educated in private schools (compared to the LA state average of 16%).

What percentage of private schools are religiously affiliated in St. Tammany Parish?

67% of private schools in St. Tammany Parish are religiously affiliated (most commonly Catholic and Baptist).

Which private schools in St. Tammany Parish are often viewed compared to one another?

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Year	St. Tammany Parish Average	Louisiana (LA) Average	National Average
2025	380	314	179
2024	373	307	172
2023	350	310	174
2022	366	327	185
2021	346	319	180
2020	330	310	171
2019	387	320	175
2018	389	317	172
2017	395	330	180
2016	386	329	178
2015	386	314	167

Quick Facts (2026-27)

Quick Facts (2026-27)

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

St. Tammany Parish Private Schools (Closed)

Overview

Trends in Total Number of Private Schools

Trends in the Average Number of Students Per Private School

Percentage of Students of Color Trends (2015-2025)

Academics and Faculty:

Student-Teacher Ratio Trends (2015-2025)

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

Class Size Trends (2015-2025)

Trends in Average Number of AP Courses Offered

ACT Score Trends (2015-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2023-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Students by Ethnicity:

Diversity Score Trends

Asian Student Percentage Trends

Hispanic Student Percentage Trends

Black Student Percentage Trends

White Student Percentage Trends

Other Races Student Percentage Trends

Extracurriculars and Sports:

Frequently Asked Questions

Recent Articles

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

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

St. Tammany Parish Private Schools (Closed)

Overview

Trends in Total Number of Private Schools

Trends in the Average Number of Students Per Private School

Percentage of Students of Color Trends (2015-2025)

Academics and Faculty:

Student-Teacher Ratio Trends (2015-2025)

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

Class Size Trends (2015-2025)

Trends in Average Number of AP Courses Offered

ACT Score Trends (2015-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2023-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Students by Ethnicity:

Diversity Score Trends

Asian Student Percentage Trends

Hispanic Student Percentage Trends

Black Student Percentage Trends

White Student Percentage Trends

Other Races Student Percentage Trends

Extracurriculars and Sports:

Frequently Asked Questions

More Articles