For the 2026 school year, there are 2 public high schools serving 2,163 students in New Castle, DE.
The top-ranked public high schools in New Castle, DE are Leach (John G.) School and Penn (William) High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
New Castle, DE public high schools have an average math proficiency score of 13% (versus the Delaware public high school average of 33%), and reading proficiency score of 32% (versus the 52% statewide average). High schools in New Castle have an average ranking of 2/10, which is in the bottom 50% of Delaware public high schools.
New Castle, DE public high school have a Graduation Rate of 84%, which is less than the Delaware average of 89%.
The school with highest graduation rate is Penn (William) High School, with 84% graduation rate. Read more about public school graduation rate statistics in Delaware or national school graduation rate statistics.
Minority enrollment is 76% of the student body (majority Black), which is more than the Delaware public high school average of 60% (majority Black).
Best Public High Schools in New Castle, DE (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Leach (John G.) School
Special Education School
(Math: <50% | Reading: <50%)
Rank:
Rank:
9/
Top 20%10
10 Landers Lane
New Castle, DE 19720
(302) 429-4055
New Castle, DE 19720
(302) 429-4055
Gr: PK-12 | 86 students Student-teacher ratio: 5:1 Minority enrollment: 66%
Rank: #22.
Penn (William) High School
(Math: 11% | Reading: 32%)
Rank:
Rank:
3/
Bottom 50%10
713 East Basin Road
New Castle, DE 19720
(302) 323-2800
New Castle, DE 19720
(302) 323-2800
Gr: 9-12 | 2,077 students Student-teacher ratio: 17:1 Minority enrollment: 76%
New Castle, Delaware Public Schools (Closed)
School
Location
Quick Facts
Baylor Womens Correctional Institution (Closed 2010)
Alternative School
660 Baylor Boulevard
New Castle, DE 19720
(302) 577-3004
New Castle, DE 19720
(302) 577-3004
Gr: Inquire with school
29 Chase Avenue
New Castle, DE 19720
(302) 429-4000
New Castle, DE 19720
(302) 429-4000
Gr: PK-5 | 882 students Student-teacher ratio: 14:1 Minority enrollment: 78%
801 North Dupont Highway
New Castle, DE 19720
(302) 322-6050
New Castle, DE 19720
(302) 322-6050
Gr: 9-12 | 228 students Student-teacher ratio: 15:1 Minority enrollment: 69%
Multiple Alternative Program High School (Closed 2010)
Alternative School
626 Wilmington Road
New Castle, DE 19720
(302) 322-1718
New Castle, DE 19720
(302) 322-1718
Gr: 9-12 | 72 students Minority enrollment: 56%
903 Delaware Street
New Castle, DE 19720
(302) 323-2880
New Castle, DE 19720
(302) 323-2880
Gr: 6-8 | 557 students Student-teacher ratio: 19:1 Minority enrollment: 62%
New Castle School (Colonial Ilc) (Closed 2014)
Special Education School
903 Delaware St
New Castle, DE 19720
(302) 323-2880
New Castle, DE 19720
(302) 323-2880
170 Lukens Dr
New Castle, DE 19720
(302) 573-7760
New Castle, DE 19720
(302) 573-7760
Gr: 9-12 | 411 students Student-teacher ratio: 9:1 Minority enrollment: 80%
Frequently Asked Questions
What are the top-ranked public high schools in New Castle, DE?
The top-ranked public high schools in New Castle, DE include Leach (John G.) School and Penn (William) High School.
How many public high schools are located in New Castle?
2 public high schools are located in New Castle.
What is the racial composition of students in New Castle?
New Castle public high schools minority enrollment is 76% of the student body (majority Black), which is more than the Delaware public high schools average of 60% (majority Black).
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