[+] Show Closed Private Schools in Mercer County, New Jersey

Overview

Academics and Faculty:

# Teachers

1,501 Teachers

20,263 Teachers

Average Student-Teacher Ratio

8:1

11:1

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Student-Teacher Ratio Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	8:1	11:1	11:1
2024	8:1	11:1	11:1
2023	8:1	11:1	11:1
2022	8:1	11:1	11:1
2021	8:1	11:1	11:1
2020	9:1	11:1	12:1
2019	9:1	11:1	12:1
2018	9:1	11:1	12:1
2017	9:1	11:1	12:1
2016	9:1	11:1	12:1
2015	10:1	12:1	12:1

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% Average Faculty w/Advanced Degree

58%

53%

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Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	58%	54%	55%
2024	58%	53%	54%
2023	60%	54%	54%
2022	58%	54%	54%
2021	58%	53%	54%
2020	56%	52%	54%
2019	57%	53%	53%
2018	56%	53%	53%
2017	54%	52%	53%
2016	57%	50%	52%
2015	55%	51%	52%

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Average Class Size

13 students

14 students

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Class Size Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	13	14	15
2024	12	14	15
2023	12	14	15
2022	13	14	15
2021	13	14	15
2020	12	14	15
2019	12	14	15
2018	12	14	15
2017	12	14	15
2016	12	14	15
2015	12	14	15

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Average Number of AP Courses

17 courses

15 courses

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Trends in Average Number of AP Courses Offered
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	17	15	13
2024	17	14	12
2023	19	14	11
2022	19	13	11
2021	19	13	11
2020	16	13	11
2019	16	12	11
2018	18	12	11
2017	18	11	10
2016	17	10	10
2015	16	9	10

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Average SAT score

1342

(Out of 1600)

1260

View Data

SAT Score Trends (2017-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	1342	1262	1233
2024	1342	1251	1230
2023	1342	1246	1228
2022	1349	1237	1229
2021	1349	1243	1229
2020	1349	1248	1226
2019	1337	1260	1226
2018	1347	1259	1226
2017	1336	1256	1233

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Average ACT score

(Out of 36)

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ACT Score Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	29	29	26
2024	29	28	26
2023	28	28	26
2022	28	28	26
2021	28	28	26
2020	28	28	25
2019	28	28	25
2018	28	27	25
2017	28	26	25
2016	27	26	25
2015	26	26	25

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Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$33,467

$18,745

View Data

Tuition Cost Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	$33,367	$18,947	$15,012
2024	$30,298	$15,878	$13,254
2023	$29,849	$15,215	$12,626
2022	$29,417	$14,919	$12,187
2021	$29,071	$13,993	$11,800
2020	$27,857	$13,826	$11,512
2019	$27,183	$13,406	$11,293
2018	$26,673	$13,176	$11,017
2017	$26,847	$13,780	$10,708
2016	$27,464	$13,054	$10,356
2015	$23,460	$11,979	$9,939

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Average Summer Program Cost

$396

$850

View Data

Summer Program Cost Trends (2019-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	$396	$869	$1,152
2024	$428	$917	$1,128
2023	$575	$1,102	$1,156
2022	$9,976	$1,813	$1,102
2021	$9,976	$1,709	$1,125
2020	$9,976	$1,431	$1,217
2019	$9,976	$1,539	$1,305

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Average % on Financial Aid

37%

27%

View Data

Percent on Financial Aid Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	37%	27%	34%
2024	38%	27%	34%
2023	34%	27%	34%
2022	32%	26%	33%
2021	32%	27%	33%
2020	32%	27%	32%
2019	32%	27%	31%
2018	31%	26%	30%
2017	29%	25%	30%
2016	28%	24%	29%
2015	24%	22%	28%

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Average Financial Aid Grant

$17,119

$16,021

View Data

Financial Aid Grant Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	$17,119	$16,414	$7,073
2024	$15,855	$16,167	$6,930
2023	$21,712	$8,892	$6,469
2022	$21,712	$8,911	$6,289
2021	$21,103	$8,292	$6,055
2020	$20,785	$8,259	$5,921
2019	$20,747	$8,310	$5,795
2018	$20,480	$8,039	$5,456
2017	$18,149	$7,673	$5,319
2016	$16,673	$7,478	$5,105
2015	$28,859	$6,177	$5,030

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Average Acceptance Rate

68%

78%

View Data

Acceptance Rate Trends (2015-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	67%	77%	81%
2024	57%	78%	85%
2023	56%	80%	85%
2022	53%	79%	85%
2021	53%	79%	85%
2020	55%	79%	85%
2019	56%	79%	85%
2018	56%	79%	85%
2017	57%	79%	85%
2016	60%	79%	85%
2015	63%	79%	85%

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Average Endowment Size

$354.83 million

$54.78 million

View Data

Endowment Trends (2019-2025)
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	$354 M	$52 M	$39 M
2024	$354 M	$97 M	$39 M
2023	$266 M	$79 M	$39 M
2022	$265 M	$89 M	$40 M
2021	$265 M	$94 M	$40 M
2020	$265 M	$94 M	$40 M
2019	$265 M	$94 M	$40 M

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Students by Ethnicity:

0.68

0.63

View Data

Diversity Score Trends
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	0.68	0.63	0.65
2024	0.68	0.64	0.65
2023	0.66	0.65	0.65
2022	0.63	0.65	0.64
2021	0.63	0.65	0.64
2020	0.62	0.65	0.64
2019	0.62	0.65	0.63
2018	0.63	0.65	0.63
2017	0.61	0.64	0.61
2016	0.61	0.65	0.61
2015	0.63	0.65	0.61

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# American Indian Students

16 Students

942 Students

% American Indian Students

n/a

# Asian Students

1,027 Students

11,318 Students

% Asian Students

View Data

Asian Student Percentage Trends
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	9%	6%	5%
2024	10%	6%	5%
2023	10%	6%	5%
2022	7%	6%	4%
2021	7%	5%	4%
2020	8%	5%	4%
2019	6%	5%	4%
2018	6%	5%	4%
2017	5%	5%	4%
2016	5%	5%	4%
2015	6%	4%	4%

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# Hispanic Students

799 Students

15,574 Students

% Hispanic Students

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Hispanic Student Percentage Trends
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	7%	8%	9%
2024	8%	7%	9%
2023	6%	7%	9%
2022	6%	7%	8%
2021	6%	8%	9%
2020	6%	8%	9%
2019	5%	8%	8%
2018	5%	8%	8%
2017	5%	8%	8%
2016	5%	8%	8%
2015	5%	8%	8%

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# Black Students

1,301 Students

14,112 Students

% Black Students

12%

View Data

Black Student Percentage Trends
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	12%	6%	7%
2024	12%	7%	7%
2023	11%	7%	8%
2022	11%	8%	7%
2021	11%	8%	7%
2020	11%	8%	8%
2019	12%	9%	7%
2018	11%	9%	7%
2017	13%	9%	7%
2016	13%	9%	7%
2015	11%	9%	8%

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# White Students

5,632 Students

116,208 Students

% White Students

51%

54%

View Data

White Student Percentage Trends
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	51%	53%	52%
2024	50%	53%	52%
2023	53%	51%	52%
2022	57%	52%	54%
2021	57%	52%	54%
2020	57%	52%	54%
2019	57%	52%	56%
2018	56%	52%	56%
2017	58%	53%	58%
2016	59%	53%	58%
2015	56%	51%	58%

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# Hawaiian Students

7 Students

292 Students

% Hawaiian Students

n/a

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

2,333 Students

58,685 Students

% of Others Students

21%

27%

View Data

Other Races Student Percentage Trends
Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	21%	27%	26%
2024	20%	27%	26%
2023	20%	29%	25%
2022	19%	27%	25%
2021	19%	27%	25%
2020	18%	27%	24%
2019	20%	26%	24%
2018	22%	26%	23%
2017	19%	25%	22%
2016	18%	25%	22%
2015	22%	28%	21%

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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars

17 extracurriculars

12 extracurriculars

Average Number of Sports

8 sports

7 sports

Frequently Asked Questions

What are the top ranked private schools in Mercer County, NJ?

The private schools in Mercer County, NJ include Stuart Country Day School, Princeton Day School, and The Lawrenceville School.

How many private schools are located in Mercer County?

75 private schools are located in Mercer County.

How much do private schools cost in Mercer County?

The average tuition cost is $33,467, which is higher than the New Jersey private school average tuition cost of $18,745.

How diverse are private schools in Mercer County?

Mercer County private schools are approximately 48% minority students, which is higher than the New Jersey private school average of 40%.

What percentage of students in Mercer County go to private school?

16% of all K-12 students in Mercer County are educated in private schools (compared to the NJ state average of 14%).

What percentage of private schools are religiously affiliated in Mercer County?

31% of private schools in Mercer County are religiously affiliated (most commonly Catholic and Islamic).

Which private schools in Mercer County are often viewed compared to one another?

Popular comparisons of private schools in Mercer County include: The Hun School Of Princeton vs. Princeton Day School, Princeton Day School vs. The Hun School Of Princeton, Harmony School At Princeton vs. Chapin School

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The Journey to Enrollment

Year	Mercer County Average	New Jersey (NJ) Average	National Average
2025	178	168	179
2024	172	165	172
2023	178	164	174
2022	182	167	185
2021	180	165	180
2020	179	160	171
2019	178	164	175
2018	180	164	172
2017	201	167	180
2016	203	166	178
2015	206	154	167

Quick Facts (2026-27)

Quick Facts (2026-27)

Top Ranked Mercer County Private Schools (2026-27)

Mercer County 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

SAT Score Trends (2017-2025)

ACT Score Trends (2015-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2019-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Endowment Trends (2019-2025)

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 Mercer County Private Schools (2026-27)

Top Ranked Mercer County Private Schools (2026-27)

Mercer County 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

SAT Score Trends (2017-2025)

ACT Score Trends (2015-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2019-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Endowment Trends (2019-2025)

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