Mariner Middle School

Set in Milton, Delaware, Mariner Middle School is a tight-knit middle school, operated by Cape Henlopen School District. It works with 552 students across grades 6 through 8.

Within Cape Henlopen School District, which oversees 10 schools and 6,654 students, Mariner Middle School is one campus in the system.

On the student-mix side, Mariner Middle School lists that 55% of students identify as White, with the remaining enrollment distributed across several groups. The remainder looks like 27% Hispanic, 11% Black, 6% multiracial. That is visibly less White than the county at large, where the share is closer to 74%.

On the income-and-resources front, The school lists 47 full-time-equivalent teachers, for a student-teacher ratio near 11.7:1. The state averages around 16.4:1, so this campus is tighter than the state norm typical.

In the surrounding community, community-level numbers for Sussex County indicate median household income runs about $81,497, roughly 33% of adults have completed at least a four-year degree, and roughly 8% of residents live below the federal poverty line. Mariner Middle School is one of 55 public schools in Sussex County (combined enrollment of about 32,366 students).

Nearest neighbor: Milton Elementary School, around 0.5 miles off. Counting just inside five miles, 3 other public schools cluster around Mariner Middle School.

The school occupies a small-town site.

Over the past 7-year window. Over the past 7-year window, the student count edged down 8%: 600 students in 2018 compared to 552 in 2025. Black enrollment moved from 19% to 11% across the same window. Class-load math has pulled in: from 14.3:1 in 2018 to 11.7:1 in 2025.

On the community side, recent activity here tends to focus on enrollment questions, classroom assignments, and PTA news. Members of the school community can share what they know.