Mariner Middle School

Regular School · Milton, DE

Mariner Middle School is a regular school school in Milton, Delaware, serving grades 06–08 with 552 students enrolled (SY 2024-2025). The student-teacher ratio is 11.7:1.

Level

Middle

Grades

06 – 08

Enrollment

552

Teachers (FTE)

47.0

Student–Teacher Ratio

11.7:1

Status

Open

Lunch Program Participation

Yes participating without using any Provision or the CEO

Student Demographics (SY 2024-2025)

Race / Ethnicity	Students	Share
White	302	55%
Hispanic/Latino	151	27%
Black or African American	61	11%
Two or more races	33	6%
Asian	4	1%
Native Hawaiian / Pacific Islander	1	0%
Total enrollment	552	279M / 273F

English Language Learners: 60 (11% of enrollment) · SY 2021–22

Academic Performance (SY 2021-2022)

Metric	This School	State Avg	Tested
Math Proficiency	32.0% +3.2pp	28.8%	473
Reading Proficiency	48.0% +3.5pp	44.5%	477
Science Proficiency	20-24%	—	154

Source: EDFacts, SY 2020–2021. Suppressed values (e.g. <=10%) indicate fewer than the minimum reportable threshold.

Stanford Achievement Estimate

Pooled score across SY 2009–2022 (grades 3–8), expressed in grade levels relative to the national average. Positive = above average.

Overall (Math + ELA)

+0.07 grade levels

Math

-0.03 grade levels

Programs & Discipline

Gifted & Talented

Program offered

71 students enrolled

Out-of-School Suspensions

5.1% of enrollment · SY 2021–22

Chronically Absent

271

49.1% of enrollment · SY 2019–20

Source: Civil Rights Data Collection (CRDC), Office for Civil Rights & EDFacts.

Lunch Program (SY 2024-2025)

Category	Students	% of School
Total enrollment (est.)	552	100%

Contact & Location

16391 Harbeson Rd

Milton, DE 19968

Phone: (302)685-8516

http://www.capehenlopenschools.com/Page/13

District

Cape Henlopen School District

Per-pupil expenditure: $25,410

District enrollment: 6,336

Other Schools in District

H. O. Brittingham Elementary School Elementary
Lewes Elementary School Elementary
Love Creek Elementary School Elementary
Milton Elementary School Elementary
Rehoboth Elementary School Elementary
Cape Henlopen High School High
Beacon Middle School Middle
Sussex Consortium Other

Related Data

Neighborhood demographics (ZIP 19968) → CensusDepth.com
Delaware population & income data → CensusDepth.com
Delaware teacher salaries → WageDepth.com

NCES ID

100017000033

Data sources: NCES CCD SY 2024-2025 (directory, staff, lunch), EDFacts SY 2020-21 (assessments), CRDC SY 2021-22 (programs & discipline), SEDA v6.0 (achievement estimates). Updated annually. NCES CCD