Serving 552 students in grades 6-8, Mariner Middle School ranks in the top 30% of all schools in Delaware for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 37% (which is higher than the Delaware state average of 31%). The percentage of students achieving proficiency in reading/language arts is 48% (which is higher than the Delaware state average of 42%).
The student-teacher ratio of 12:1 is lower than the Delaware state level of 15:1.
Minority enrollment is 45% of the student body (majority Hispanic), which is lower than the Delaware state average of 62% (majority Black).
Quick Facts (2026)
- Grades: 6-8
- Enrollment: 552 students
- Student-Teacher Ratio: 12:1
- Minority Enrollment: 45%
- Overall Testing Rank: Top 30% in DE
- Math Proficiency: 37% (Top 50%)
- Reading Proficiency: 48% (Top 50%)
- Science Proficiency: 29% (Top 30%)
- Attendance Zone: Mariner Middle School serves the northwest part of the Milton, DE school district, covering an area of approximately 108.3 square miles. Families can typically expect a drive of 10-15 minutes to the school, with the furthest edge of the attendance zone located about 9.1 miles away.
- Source: National Center for Education Statistics (NCES), DE Dept. of Education
School Overview
Mariner Middle School's student population of 552 students has declined by 11% over five school years.
The teacher population of 47 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 6-8
(No virtual instruction)
(No virtual instruction)
Total Students
552 students
Total Classroom Teachers
47 teachers
School Rankings
Mariner Middle School ranks within the top 30% of all 199 schools in Delaware (based off of combined math and reading proficiency testing data).
The diversity score of Mariner Middle School is 0.61, 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
#58 out of 199 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
37%
31%
Reading/Language Arts Test Scores (% Proficient)
48%
42%
Science Test Scores (% Proficient)
29%
21%
Student-Teacher Ratio
12:1
15:1
American Indian
n/a
n/a
Asian
1%
5%
Hispanic
27%
20%
Black
11%
31%
White
55%
38%
Hawaiian
n/a
n/a
Two or more races
6%
6%
All Ethnic Groups
Chronically Absent Students
(22-23)35%
24.3%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
37%
33%
Eligible for Reduced Lunch (12-13)
5%
5%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), DE Dept. of Education
Frequently Asked Questions
What is Mariner Middle School's ranking?
Mariner Middle School is ranked #58 out of 199 schools, which ranks it among the top 30% of public schools in Delaware.
What schools are Mariner Middle School often compared to?
Mariner Middle Schoolis often viewed alongside schools like Beacon Middle School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
37% of students have achieved math proficiency (compared to the 31% DE state average), while 48% of students have achieved reading proficiency (compared to the 42% DE state average).
How many students attend Mariner Middle School?
552 students attend Mariner Middle School.
What is the racial composition of the student body?
55% of Mariner Middle School students are White, 27% of students are Hispanic, 11% of students are Black, 6% of students are Two or more races, and 1% of students are Asian.
What is the student-teacher ratio of Mariner Middle School?
Mariner Middle School has a student ration of 12:1, which is lower than the Delaware state average of 15:1.
What grades does Mariner Middle School offer ?
Mariner Middle School offers enrollment in grades 6-8 (No virtual instruction).
What school district is Mariner Middle School part of?
Mariner Middle School is part of Cape Henlopen School District.
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