Delcastle Technical High School is a public vocational-technical high school in unincorporated New Castle County, Delaware, near Wilmington, and is the largest of four high schools within the New Castle ...
Serving 1,605 students in grades 9-12, Delcastle Technical High School ranks in the bottom 50% of all schools in Delaware for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 10% (which is lower than the Delaware state average of 31%). The percentage of students achieving proficiency in reading/language arts is 36% (which is lower than the Delaware state average of 42%).
The student-teacher ratio of 14:1 is lower than the Delaware state level of 15:1.
Minority enrollment is 80% of the student body (majority Hispanic), which is higher than the Delaware state average of 62% (majority Black and Hispanic).
Quick Facts (2026)
- School Type: Vocational school
- Grades: 9-12
- Enrollment: 1,605 students
- Student-Teacher Ratio: 14:1
- Minority Enrollment: 80%
- Graduation Rate: 95% (Top 50% in DE)
- Overall Testing Rank: Bottom 50%
- Math Proficiency: 10% (Btm 50%)
- Reading Proficiency: 36% (Btm 50%)
- Science Proficiency: 17% (Btm 50%)
- Source: National Center for Education Statistics (NCES), DE Dept. of Education
School Overview
Delcastle Technical High School's student population of 1,605 students has stayed relatively flat over five school years.
The teacher population of 118 teachers has declined by 7% over five school years.
School Type
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,605 students
Total Classroom Teachers
118 teachers
Year Founded
1969
Colors
White, Navy Blue
School Rankings
Delcastle Technical High School ranks within the bottom 50% of all 199 schools in Delaware (based off of combined math and reading proficiency testing data).
The diversity score of Delcastle Technical High School is 0.68, which is less than the diversity score at state average of 0.72. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#156 out of 199 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
10%
31%
Reading/Language Arts Test Scores (% Proficient)
36%
42%
Science Test Scores (% Proficient)
17%
21%
Student-Teacher Ratio
14:1
15:1
American Indian
1%
n/a
Asian
1%
5%
Hispanic
44%
20%
Black
30%
31%
White
20%
38%
Hawaiian
n/a
n/a
Two or more races
4%
6%
All Ethnic Groups
Graduation Rate
95%
88%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
30%
33%
Eligible for Reduced Lunch (12-13)
9%
5%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), DE Dept. of Education
School Notes
- School Mascot: Cougars
Frequently Asked Questions
What is Delcastle Technical High School's ranking?
Delcastle Technical High School is ranked #156 out of 199 schools, which ranks it among the bottom 50% of public schools in Delaware.
What schools are Delcastle Technical High School often compared to?
Delcastle Technical High Schoolis often viewed alongside schools like Hodgson (Paul M.) Vocational Technical High School, Howard High School Of Technology by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
10% of students have achieved math proficiency (compared to the 31% DE state average), while 36% of students have achieved reading proficiency (compared to the 42% DE state average).
What is the graduation rate of Delcastle Technical High School?
The graduation rate of Delcastle Technical High School is 95%, which is higher than the Delaware state average of 88%.
How many students attend Delcastle Technical High School?
1,605 students attend Delcastle Technical High School.
What is the racial composition of the student body?
44% of Delcastle Technical High School students are Hispanic, 30% of students are Black, 20% of students are White, 4% of students are Two or more races, 1% of students are American Indian, and 1% of students are Asian.
What is the student-teacher ratio of Delcastle Technical High School?
Delcastle Technical High School has a student ration of 14:1, which is lower than the Delaware state average of 15:1.
What grades does Delcastle Technical High School offer ?
Delcastle Technical High School offers enrollment in grades 9-12 (No virtual instruction).
What school district is Delcastle Technical High School part of?
Delcastle Technical High School is part of New Castle County Vocational-Technical School District.
School Calendar
View the Delcastle Technical High School yearly calendar below. Note key dates such as:
Event
Date
First Day of Fall Sports Season 2026
August 10, 2026 (Monday)
First Day of Classes: 12th Grade Only
August 24, 2026 (Monday)
First Day of Classes: 11th Grade Only (Seniors: Asynchronous)
August 25, 2026 (Tuesday)
First Day of Classes: 10th Grade Only (12th Grade: Asynchronous)
August 26, 2026 (Wednesday)
First Day of Classes: 9th Grade Only (12th Grade: Asynchronous)
August 27, 2026 (Thursday)
School Reviews
5 10/10/2025
Delcastle is a school where our children will graduate with a certificate in their career area. This will enable them to be able to find a job with a decent starting rate. I definately recommend this school. My son has done very well with his academics and in sports. The teachers are very helpful as well. I do feel that parent involvement could be better though. The teachers give students a day (Tuesday) to stay afterschool for extra help if needed. This is a plus...
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