Top 34 high schools in Delaware (2025)

Schools classified as high schools by NCES. Ranked by the Success Index (US) from official American data; 34 schools shown.

1
82
Charter School of WilmingtonWilmington · Charter High91% Math proficiency · 977 students
2
70
Calloway (Cab) School of the ArtsWilmington · Public High62% Math proficiency · 941 students
3
69
Conrad Schools of ScienceWilmington · Public High63% Math proficiency · 1,164 students
4
62
Delaware Military AcademyWilmington · Charter High37% Math proficiency · 547 students
5
56
Christiana High SchoolNewark · Public High49% Math proficiency · 1,425 students
6
56
Appoquinimink High SchoolMiddletown · Public High40% Math proficiency · 1,357 students
7
50
Indian River High SchoolDagsboro · Public High35% Math proficiency · 1,073 students
8
50
Mount Pleasant High SchoolWilmington · Public High35% Math proficiency · 1,084 students
9
49
Middletown High SchoolMiddletown · Public High34% Math proficiency · 1,231 students
10
49
Odessa High SchoolTownsend · Public High– · 1,254 students
11
48
Cape Henlopen High SchoolLewes · Public High33% Math proficiency · 1,889 students
12
48
Concord High SchoolWilmington · Public High32% Math proficiency · 994 students
13
45
Dickinson (John) SchoolWilmington · Public High38% Math proficiency · 1,027 students
14
44
Caesar Rodney High SchoolCamden · Public High33% Math proficiency · 2,254 students
15
37
Delmar High SchoolDelmar · Public High37% Math proficiency · 713 students
16
35
Brandywine High SchoolWilmington · Public High22% Math proficiency · 897 students
17
32
Smyrna High SchoolSmyrna · Public High23% Math proficiency · 1,777 students
18
27
Newark High SchoolNewark · Public High22% Math proficiency · 1,039 students
19
25
duPont (Alexis I.) High SchoolWilmington · Public High17% Math proficiency · 550 students
20
25
Sussex Central High SchoolGeorgetown · Public High21% Math proficiency · 2,012 students
21
23
Lake Forest High SchoolFelton · Public High20% Math proficiency · 951 students
22
22
Milford Senior High SchoolMilford · Public High16% Math proficiency · 1,271 students
23
20
Woodbridge High SchoolGreenwood · Public High12% Math proficiency · 728 students
24
19
Early College School at Del StateDover · Charter High17% Math proficiency · 583 students
25
19
First State Military AcademyClayton · Charter High12% Math proficiency · 433 students
26
19
Dover High SchoolDover · Public High17% Math proficiency · 1,812 students
27
19
Great Oaks Charter SchoolWilmington · Charter High16% Math proficiency · 149 students
28
17
Penn (William) High SchoolNew Castle · Public High15% Math proficiency · 2,069 students
29
16
Positive Outcomes Charter SchoolCamden · Charter High5% Math proficiency · 119 students
30
15
McKean (Thomas) High SchoolWilmington · Public High2.5% Math proficiency · 920 students
31
14
Laurel Senior High SchoolLaurel · Public High12% Math proficiency · 753 students
32
12
Freire Charter SchoolWilmington · Charter High12% Math proficiency · 406 students
33
8
Glasgow High SchoolNewark · Public High2.5% Math proficiency · 908 students
34
7
Seaford Senior High SchoolSeaford · Public High7.5% Math proficiency · 960 students

#	School	Sector	Success Index (US)	Key result	Students
1	Charter School of Wilmington Wilmington · High · Grades 9–12	Charter	82.3 Top 10%	91% Math proficiency	977
2	Calloway (Cab) School of the Arts Wilmington · High · Grades 6–12	Public	70.3 Top 25%	62% Math proficiency	941
3	Conrad Schools of Science Wilmington · High · Grades 6–12	Public	68.8 Top 25%	63% Math proficiency	1,164
4	Delaware Military Academy Wilmington · High · Grades 9–12	Charter	62.0 Top 50%	37% Math proficiency	547
5	Christiana High School Newark · High · Grades 6–12	Public	56.1 Top 50%	49% Math proficiency	1,425
6	Appoquinimink High School Middletown · High · Grades 9–12	Public	55.8 Top 50%	40% Math proficiency	1,357
7	Indian River High School Dagsboro · High · Grades 9–12	Public	50.1 Top 50%	35% Math proficiency	1,073
8	Mount Pleasant High School Wilmington · High · Grades 9–12	Public	49.8 Top 50%	35% Math proficiency	1,084
9	Middletown High School Middletown · High · Grades 9–12	Public	49.4 Lower 50%	34% Math proficiency	1,231
10	Odessa High School Townsend · High · Grades 9–12	Public	48.7 Lower 50%	–	1,254
11	Cape Henlopen High School Lewes · High · Grades 9–12	Public	48.0 Lower 50%	33% Math proficiency	1,889
12	Concord High School Wilmington · High · Grades 9–12	Public	47.5 Lower 50%	32% Math proficiency	994
13	Dickinson (John) School Wilmington · High · Grades 6–12	Public	45.0 Lower 50%	38% Math proficiency	1,027
14	Caesar Rodney High School Camden · High · Grades 9–12	Public	44.2 Lower 50%	33% Math proficiency	2,254
15	Delmar High School Delmar · High · Grades 9–12	Public	37.2 Lower 50%	37% Math proficiency	713
16	Brandywine High School Wilmington · High · Grades 9–12	Public	35.3 Lower 50%	22% Math proficiency	897
17	Smyrna High School Smyrna · High · Grades 9–12	Public	31.8 Lower 50%	23% Math proficiency	1,777
18	Newark High School Newark · High · Grades 9–12	Public	27.2 Lower 50%	22% Math proficiency	1,039
19	duPont (Alexis I.) High School Wilmington · High · Grades 9–12	Public	24.6 Lower 50%	17% Math proficiency	550
20	Sussex Central High School Georgetown · High · Grades 9–12	Public	24.5 Lower 50%	21% Math proficiency	2,012
21	Lake Forest High School Felton · High · Grades 9–12	Public	23.0 Lower 50%	20% Math proficiency	951
22	Milford Senior High School Milford · High · Grades 9–12	Public	22.3 Lower 50%	16% Math proficiency	1,271
23	Woodbridge High School Greenwood · High · Grades 9–12	Public	20.2 Lower 50%	12% Math proficiency	728
24	Early College School at Del State Dover · High · Grades 7–12	Charter	19.3 Lower 50%	17% Math proficiency	583
25	First State Military Academy Clayton · High · Grades 9–12	Charter	19.0 Lower 50%	12% Math proficiency	433
26	Dover High School Dover · High · Grades 9–12	Public	18.8 Lower 50%	17% Math proficiency	1,812
27	Great Oaks Charter School Wilmington · High · Grades 9–12	Charter	18.6 Lower 50%	16% Math proficiency	149
28	Penn (William) High School New Castle · High · Grades 9–12	Public	17.0 Lower 50%	15% Math proficiency	2,069
29	Positive Outcomes Charter School Camden · High · Grades 7–12	Charter	15.9 Lower 50%	5% Math proficiency	119
30	McKean (Thomas) High School Wilmington · High · Grades 9–12	Public	14.7 Lower 50%	2.5% Math proficiency	920
31	Laurel Senior High School Laurel · High · Grades 9–12	Public	14.0 Lower 50%	12% Math proficiency	753
32	Freire Charter School Wilmington · High · Grades 8–12	Charter	12.3 Lower 50%	12% Math proficiency	406
33	Glasgow High School Newark · High · Grades 9–12	Public	8.1 Lower 50%	2.5% Math proficiency	908
34	Seaford Senior High School Seaford · High · Grades 9–12	Public	7.3 Lower 50%	7.5% Math proficiency	960

Charter School of Wilmington in Wilmington leads the 2025 list of high schools in Delaware with a Success Index (US) of 82.3. Of the 34 schools shown, 27 are public, 7 are charter.

Scores are percentiles within school type, so a elementary school and a high school with the same score sit at the same point in their own distributions. Use the rankings to build a shortlist, then visit the schools and ask how they support students at your child's level.

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Frequently asked questions

What is the best high school in Delaware?

Charter School of Wilmington in Wilmington ranks first among high schools in Delaware with a Success Index (US) of 82.3 out of 100 (Enrollment: 977).

How are high schools in Delaware ranked?

Each school's Success Index (US) combines 4 factors: math proficiency (30%), reading proficiency (30%), community advantage (fewer free/reduced-price lunch) (25%), students per teacher (15%). Each factor is a percentile against schools of the same type across United States. Schools with fewer than 60 students are excluded from rankings.

Are these 2025 rankings official?

No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.