[+] Show Closed Private Schools in New Castle County, Delaware

Overview

Academics and Faculty:

# Teachers

2,003 Teachers

2,295 Teachers

Average Student-Teacher Ratio

10:1

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Student-Teacher Ratio Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	10:1	10:1	11:1
2024	10:1	10:1	11:1
2023	10:1	10:1	11:1
2022	10:1	10:1	11:1
2021	10:1	10:1	11:1
2020	10:1	10:1	12:1
2019	10:1	10:1	12:1
2018	10:1	10:1	12:1
2017	11:1	11:1	12:1
2016	11:1	11:1	12:1
2015	11:1	11:1	12:1

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% Average Faculty w/Advanced Degree

50%

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Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	48%	49%	55%
2024	47%	47%	54%
2023	47%	48%	54%
2022	46%	46%	54%
2021	46%	46%	54%
2020	46%	46%	54%
2019	41%	42%	53%
2018	40%	41%	53%
2017	42%	43%	53%
2016	42%	43%	52%
2015	42%	43%	52%

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Average Class Size

15 students

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Class Size Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	15	15	15
2024	15	15	15
2023	15	15	15
2022	15	15	15
2021	16	16	15
2020	15	15	15
2019	16	15	15
2018	16	16	15
2017	15	15	15
2016	15	15	15
2015	15	14	15

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Average Number of AP Courses

15 courses

14 courses

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

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Average SAT score

1222

(Out of 1600)

1222

View Data

SAT Score Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	1241	1241	1233
2024	1219	1219	1230
2023	1224	1215	1228
2022	1220	1220	1229
2021	1227	1217	1229
2020	1230	1218	1226
2019	1228	1217	1226
2018	1228	1217	1226
2017	1218	1208	1233
2016	1433	1464	1306
2015	1396	1396	1258

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Average ACT score

(Out of 36)

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ACT Score Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	27	27	26
2024	27	27	26
2023	27	27	26
2022	27	27	26
2021	27	26	26
2020	25	25	25
2019	25	25	25
2018	25	25	25
2017	25	25	25
2016	22	23	25
2015	23	24	25

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Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$18,339

$16,213

View Data

Tuition Cost Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	$18,233	$16,119	$15,012
2024	$15,481	$13,288	$13,254
2023	$14,047	$11,799	$12,626
2022	$13,051	$11,004	$12,187
2021	$13,205	$11,201	$11,800
2020	$13,177	$10,982	$11,512
2019	$13,461	$11,033	$11,293
2018	$13,075	$10,771	$11,017
2017	$12,877	$9,988	$10,708
2016	$13,751	$10,804	$10,356
2015	$13,379	$10,515	$9,939

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Average Summer Program Cost

$1,248

$993

View Data

Summer Program Cost Trends (2019-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	$1,242	$1,242	$1,152
2024	$1,230	$1,230	$1,128
2023	$345	$345	$1,156
2022	$340	$340	$1,102
2021	$340	$340	$1,125
2020	$340	$340	$1,217
2019	$340	$340	$1,305

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Average % on Financial Aid

39%

38%

View Data

Percent on Financial Aid Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	39%	37%	34%
2024	40%	38%	34%
2023	41%	42%	34%
2022	36%	37%	33%
2021	36%	37%	33%
2020	35%	36%	32%
2019	37%	38%	31%
2018	35%	36%	30%
2017	35%	36%	30%
2016	33%	34%	29%
2015	29%	31%	28%

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Average Financial Aid Grant

$12,121

$9,960

View Data

Financial Aid Grant Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	$11,336	$9,066	$7,073
2024	$4,855	$3,849	$6,930
2023	$4,623	$3,781	$6,469
2022	$4,141	$3,603	$6,289
2021	$4,141	$3,430	$6,055
2020	$4,117	$3,412	$5,921
2019	$3,965	$3,581	$5,795
2018	$3,288	$3,026	$5,456
2017	$3,386	$2,890	$5,319
2016	$3,773	$3,038	$5,105
2015	$3,377	$2,834	$5,030

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Average Acceptance Rate

85%

86%

View Data

Acceptance Rate Trends (2015-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	83%	85%	81%
2024	90%	91%	85%
2023	89%	90%	85%
2022	88%	89%	85%
2021	89%	89%	85%
2020	89%	89%	85%
2019	88%	88%	85%
2018	88%	88%	85%
2017	89%	89%	85%
2016	89%	89%	85%
2015	87%	88%	85%

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Average Endowment Size

$54.13 million

$53.54 million

View Data

Endowment Trends (2019-2025)
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	$54 M	$53 M	$60 M
2024	$20 M	$20 M	$59 M
2023	$20 M	$20 M	$71 M
2022	$3 M	$3 M	$76 M
2021	$3 M	$3 M	$71 M
2020	$5 M	$5 M	$74 M
2019	$5 M	$5 M	$78 M

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Students by Ethnicity:

0.59

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Diversity Score Trends
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	0.59	0.58	0.65
2024	0.58	0.57	0.65
2023	0.56	0.56	0.65
2022	0.52	0.53	0.64
2021	0.54	0.54	0.64
2020	0.54	0.54	0.64
2019	0.51	0.51	0.63
2018	0.51	0.51	0.63
2017	0.50	0.50	0.61
2016	0.50	0.50	0.61
2015	0.50	0.51	0.61

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# American Indian Students

26 Students

39 Students

% American Indian Students

n/a

# Asian Students

803 Students

853 Students

% Asian Students

View Data

Asian Student Percentage Trends
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	5%	4%	5%
2024	5%	5%	5%
2023	4%	4%	5%
2022	4%	4%	4%
2021	4%	4%	4%
2020	4%	4%	4%
2019	4%	4%	4%
2018	4%	4%	4%
2017	2%	3%	4%
2016	3%	4%	4%
2015	3%	3%	4%

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# Hispanic Students

623 Students

753 Students

% Hispanic Students

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Hispanic Student Percentage Trends
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	3%	3%	9%
2024	3%	3%	9%
2023	3%	3%	9%
2022	3%	3%	8%
2021	3%	3%	9%
2020	3%	3%	9%
2019	3%	3%	8%
2018	3%	3%	8%
2017	3%	3%	8%
2016	3%	3%	8%
2015	4%	4%	8%

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# Black Students

1,725 Students

1,920 Students

% Black Students

View Data

Black Student Percentage Trends
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	9%	9%	7%
2024	10%	9%	7%
2023	9%	8%	8%
2022	8%	8%	7%
2021	9%	8%	7%
2020	9%	8%	8%
2019	8%	8%	7%
2018	8%	8%	7%
2017	8%	7%	7%
2016	8%	7%	7%
2015	8%	8%	8%

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# White Students

10,979 Students

13,016 Students

% White Students

59%

View Data

White Student Percentage Trends
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	60%	60%	52%
2024	61%	61%	52%
2023	62%	62%	52%
2022	66%	65%	54%
2021	65%	64%	54%
2020	65%	65%	54%
2019	67%	67%	56%
2018	68%	67%	56%
2017	68%	68%	58%
2016	68%	68%	58%
2015	68%	67%	58%

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# Hawaiian Students

4 Students

8 Students

% Hawaiian Students

n/a

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

4,464 Students

5,531 Students

% of Others Students

24%

25%

View Data

Other Races Student Percentage Trends
Year	New Castle County Average	Delaware (DE) Average	National Average
2025	23%	24%	26%
2024	21%	22%	26%
2023	22%	23%	25%
2022	19%	20%	25%
2021	19%	21%	25%
2020	19%	20%	24%
2019	18%	18%	24%
2018	17%	18%	23%
2017	19%	19%	22%
2016	18%	18%	22%
2015	17%	18%	21%

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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars

16 extracurriculars

14 extracurriculars

Average Number of Sports

9 sports

8 sports

Frequently Asked Questions

What are the top ranked private schools in New Castle County, DE?

The private schools in New Castle County, DE include Salesianum School, Tower Hill School, and Wilmington Friends School.

How many private schools are located in New Castle County?

100 private schools are located in New Castle County.

How much do private schools cost in New Castle County?

The average tuition cost is $18,339, which is higher than the Delaware private school average tuition cost of $16,213.

How diverse are private schools in New Castle County?

New Castle County private schools are approximately 29% minority students, which is higher than the Delaware private school average of 27%.

What percentage of students in New Castle County go to private school?

19% of all K-12 students in New Castle County are educated in private schools (compared to the DE state average of 14%).

What percentage of private schools are religiously affiliated in New Castle County?

51% of private schools in New Castle County are religiously affiliated (most commonly Catholic and Christian).

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

Popular comparisons of private schools in New Castle County include: Serviam Girls Academy vs. Padua Academy, Paxson Lane KinderCare vs. Casho Mill KinderCare, Urban Promise School vs. St. Edmond's Academy

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Well-Rounded Achievements

Year	New Castle County Average	Delaware (DE) Average	National Average
2025	202	173	179
2024	196	167	172
2023	196	166	174
2022	207	188	185
2021	199	182	180
2020	195	169	171
2019	199	176	175
2018	206	181	172
2017	221	191	180
2016	220	189	178
2015	206	172	167

Quick Facts (2026)

Quick Facts (2026)

Top Ranked New Castle County Private Schools (2026)

New Castle 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 (2015-2025)

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 New Castle County Private Schools (2026)

Top Ranked New Castle County Private Schools (2026)

New Castle 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 (2015-2025)

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