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

Overview

At a Glance:

New Castle County has 100 private schools serving 18,841 students. Compared with Delaware overall, the county’s average tuition is higher at $17,383 versus $15,304, while the acceptance rate and average class size are both the same as the state at 88% and 15 students.

Highlights:

Average class size is 15 students, which can support more personal attention.
39% of students receive financial aid, slightly above Delaware’s 38%.
The share of students of color is 29%, just above the state’s 28%.
Faculty with advanced degrees rose from 42% in 2016 to 48% in 2025.
Financial aid participation increased from 33% in 2016 to 39% in 2025.
Grant amounts rose sharply from $4,855 in 2024 to $11,336 in 2025.

Key Considerations:

Tuition rose from $14,348 in 2016 to $18,233 in 2025, and current tuition remains above the state average.
The number of private schools fell from 111 in 2016 to 100 in 2025.
Average students per school declined from 220 in 2016 to 202 in 2025.
The acceptance rate dropped from 90% in 2024 to 83% in 2025.

Trends in Total Number of Private Schools

Year	New Castle County Total Schools
2025	100
2024	102
2023	101
2022	100
2021	108
2020	114
2019	112
2018	111
2017	108
2016	111
2015	116

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Schools down 11 in New Castle County, from 111 in 2016 to 100 in 2025.

# Students

18,841 Students

22,461 Students

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

Trends in the Average Number of Students Per Private School

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

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Private school size down 18 in New Castle County, average students per school fell from 220 in 2016 to 202 in 2025.

% Average Students of Color

29%

28%

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

Percentage of Students of Color Trends (2015-2025)

Year	New Castle County Average	Delaware (DE) Average	National Average
2025	28%	27%	34%
2024	27%	26%	34%
2023	28%	28%	33%
2022	27%	26%	33%
2021	27%	26%	32%
2020	26%	25%	32%
2019	25%	25%	31%
2018	23%	23%	31%
2017	28%	28%	32%
2016	29%	29%	32%
2015	28%	29%	32%

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Academics and Faculty:

# Teachers

2,001 Teachers

2,293 Teachers

Average Student-Teacher Ratio

10:1

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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

49%

50%

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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Faculty degrees up 6 points in New Castle County, from 42% in 2016 to 48% in 2025.

Average Class Size

15 students

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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Class size held at 15 in New Castle County private schools in 2025, matching Delaware and the U.S. and returning to the 2016 level.

Average Number of AP Courses

16 courses

15 courses

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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AP courses down 4 in New Castle County private schools, from 19 in 2019 to 15 in 2025.

Average SAT score

1223

(Out of 1600)

View Data

SAT Score Trends (2021-2023)

Year	New Castle County Average	Delaware (DE) Average	National Average
2023	1224	1215	1228
2021	1227	1217	1229

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Average ACT score

(Out of 36)

Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$17,383

$15,304

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

Tuition Cost Trends (2015-2025)

Year	New Castle County Average	Delaware (DE) Average	National Average
2025	$18,233	$16,119	$15,012
2024	$17,345	$15,416	$14,622
2023	$16,933	$15,055	$14,057
2022	$15,534	$13,976	$13,504
2021	$15,521	$13,959	$13,232
2020	$15,489	$13,926	$12,915
2019	$15,240	$13,741	$12,656
2018	$14,804	$13,415	$12,363
2017	$14,675	$13,279	$12,049
2016	$14,348	$13,023	$11,633
2015	$14,133	$12,650	$11,174

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Tuition rose 27% in New Castle County, climbing from $14,348 in 2016 to $18,233 in 2025.

Average Summer Program Cost

$1,252

Average % on Financial Aid

39%

38%

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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Financial aid up 6 points in New Castle County, rising from 33% in 2016 to 39% in 2025.

Average Financial Aid Grant

$11,851

$9,888

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
2015	$3,377	$2,834	$5,030

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Grant amounts jumped sharply in New Castle County from $4,855 in 2024 to $11,336 in 2025, well above Delaware's $9,066.

Average Acceptance Rate

88%

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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Acceptance rate down 7 points in New Castle County, from 90% in 2024 to 83% in 2025.

Average Endowment Size

$13.66 million

$ million

Students by Ethnicity:

0.59

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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Diversity score up 0.09 in New Castle County, rising from 0.50 in 2016 to 0.59 in 2025.

# American Indian Students

26 Students

39 Students

% American Indian Students

<1%

# Asian Students

803 Students

853 Students

% Asian Students

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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Asian share up 2 points in New Castle County private schools, rising from 3% in 2016 to 5% in 2025.

# Hispanic Students

623 Students

753 Students

% Hispanic Students

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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

Showing 2016–2025. Full 11-year historical data available below ↓

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

Showing 2016–2025. Full 11-year historical data available below ↓

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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White students down 8 points in New Castle County private schools, from 68% in 2016 to 60% in 2025.

# Hawaiian Students

4 Students

8 Students

% Hawaiian Students

<1%

# Others Students

4,480 Students

5,547 Students

% of Others Students

24%

25%

View Data

Showing 2016–2025. Full 11-year historical data available below ↓

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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Other-race share up 5 points in New Castle County private schools, from 18% in 2016 to 23% in 2025.

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 Archmere Academy, St. Elizabeth 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 $17,383, which is higher than the Delaware private school average tuition cost of $15,304.

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 28%.

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, Sharon Temple Adventist School vs. Wilmington Junior Academy

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