St Mark'S High School

Wilmington · DE · Catholic religious-affiliated

Private

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How St Mark'S High School compares for families

What families should know about St Mark'S High School.

  • LocallyDE sits right at the US average on NAEP 8th-grade math — local school quality will set your kid apart.
  • vs Similar SchoolsThe closest comparables nearby: Destiny Calling Academy, Towle Institute, St Elizabeth School and 5 more. See the sidebar to compare side-by-side.

For Parents

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Objective, government-grade data — no school pays us for placement.

Your state's public flagship

University of Delaware

65%
admit rate
$16,810
in-state tuition/yr · $41,400 out-of-state
1200–1360
SAT 25–75 · ACT 27–31

The in-state tuition gap is the flagship's biggest draw — most in-state families pay far less than the out-of-state sticker. Average net price after aid runs about $17,799/yr. Admission odds depend on your student's GPA and test scores, not which high school they attend.

See the full University of Delaware profile → Estimate your odds with your scores →

Source: IPEDS admissions, tuition & enrollment + College Scorecard net price. Flagship = the state's primary public research university.

Enrollment trend & projection

Total enrollment went from 521 in 2018 to 716 in 2022 — over 4 years.
+37.4%
Why only 3 data points?

Private school enrollment comes from the NCES Private School Universe Survey (PSS), which is collected every other year — not annually like public-school data. The most recent published collection is 2021–22; NCES targeted spring 2026 for the 2023–24 release — we'll load it as soon as it's published.

If the recent trend holds…

At its recent rate of +8.3%/year, projecting from 2022's 716 students:

2023
775
2025
909
2027
1,065

An extrapolation of the recent trajectory, not a forecast of the school's plans; ignores one-off shocks.

Revenue upside

At tuition per student, the 349 students projected to be gained by 2027 represent ≈ $5,584,000/year in tuition upside.

Tuition is an editable estimate (PSS doesn't publish tuition) — set it to your school's figure.

Most similar nearby high schools

The schools most like this one — same type, blended on distance and size — and where their enrollment is heading. These are the schools families here weigh against each other.

SchoolTypeMilesHS enrollmentTrend
Destiny Calling Academy
Wilmington
Private 0.7 4
Towle Institute
Hockessin
Private 1.5 48
St Elizabeth School
Wilmington
Private 6.2 384
Padua Academy
Wilmington
Private 7.0 480 -27.1%
Ursuline Academy
Wilmington
Private 7.2 139 -61.5%
Fairwinds Christian School
Bear
Private 5.5 147 +5.0%
Aquinas Academy
Bear
Private 10.1 81 -4.7%
Harvest Christain Academy, Wilmington
Wilmington
Private 7.0 132

For Parents

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