Average

#49 of 59 private schools in DE

St Mark's High School

High School

2501 PIKE CREEK RD, Wilmington, DE 19808

Last updated: May 2026

Private Estimated Score

Estimated academic score. This school does not have standardized test data. Based on 47 schools in Wilmington. Learn more

Enrollment

716

Student-Teacher

13.8:1

Score

5.2

Grades

9th – 12th

Enrollment

716

Student-Teacher

13.8:1

Score

5.2

Grades

9th – 12th

Updated
2021-22

Updated 2021-22

How this school compares

In Wilmington

#20 of 21

public schools

Delaware high schools

#4 of 4

About St Mark's High School

ST Mark's High School is a regular public high school located in Wilmington, Delaware, within the NEW CASTLE district. The school serves students from ninth through twelfth grade and has an enrollment of 716 students. With a student-teacher ratio of 13.8:1, ST Mark's aims to provide personalized attention to each student.

There are 52 full-time equivalent teachers at the school, dedicated to supporting the academic needs of its diverse student body. Despite not having specific test score data available, the MySchoolScout rating reflects that there is room for academic growth and development at ST Mark’s High School. The school's setting in a large suburban area offers students access to various community resources and opportunities.

ST Mark's High School is situated in a vibrant suburban environment, providing a supportive backdrop for learning and personal growth.

What Parents Should Know

As a private school, St Mark's High School operates independently from the local public school district. Families considering this school should inquire about tuition costs, financial aid availability, and the admissions process. Private schools are not required to follow the same curriculum standards as public schools, which can be either an advantage or a consideration depending on your priorities.

Compare to Public Schools

Beta

How St Mark's High School compares to 18 public schools serving similar grades in Wilmington, DE

Student-Teacher Ratio

13.8:1

This School

14.5:1

Public Avg

Avg School Size

716

This School

837

Public Avg

Avg School Scout Rating

5.2

This School

6.7

Public Avg

Student Demographics

White 89.1% vs 0%

Black 7.3% vs 0%

Hispanic 2.2% vs 0%

Asian 1.3% vs 0%

St Mark's High School Wilmington Public Avg

Nearby High Schools

School	Distance	Enrollment	STR	Rating
St Mark's High School (this school)	—	716	13.8:1	5.2
Dickinson (John) School	1.0 mi	1,032	16.6:1	7.0
McKean (Thomas) High School	2.9 mi	870	13.2:1	5.0
Delcastle Technical High School	3.3 mi	1,598	13:1	7.3
Conrad Schools of Science	4.6 mi	1,163	18.5:1	7.1
Delaware Military Academy	5.4 mi	567	16.7:1	5.4
Odyssey Charter School	5.5 mi	2,192	12.4:1	5.3
Charter School of Wilmington	5.8 mi	971	18.7:1	7.5
Calloway (Cab) School of the Arts	5.8 mi	934	20.3:1	7.2
Douglass School	5.8 mi	91	—:1	7.7
duPont (Alexis I.) High School	6.2 mi	605	14.1:1	5.9
First State School	7.7 mi	18	3:1	—
The Bancroft School	7.8 mi	535	13.4:1	6.1
Freire Charter School	7.8 mi	411	15.2:1	6.0
Great Oaks Charter School	7.9 mi	145	14.5:1	6.2
Howard High School of Technology	8.0 mi	902	13.9:1	6.3
Mount Pleasant High School	10.4 mi	1,074	14.9:1	7.6
Brandywine High School	10.5 mi	941	13.8:1	8.6
Concord High School	11.6 mi	1,015	13.7:1	8.5

Demographics sourced from NCES Private School Survey (PSS) and Common Core of Data (CCD). Comparisons are based on enrollment-weighted averages.

Score Breakdown

What This Rating Measures

This rating reflects classroom size, instructional time, student diversity, community resources, and school characteristics. Private schools are ranked against other private schools in DE.

Classroom Attention

B- 4.7 / 10

View breakdown

Student-Teacher Ratio 13.8:1

Instructional Commitment

B 6.0 / 10

View breakdown

School Day Length 6.7 hours

Annual Instructional Hours 1,206

Diversity & Inclusion

B- 5.1 / 10

View breakdown

Diversity Index 20%

Community Context

Data Unavailable

School Profile

B 5.6 / 10

View breakdown

Enrollment 716

View data sources

Score basis: Private school model

Data coverage: 80% of scoring components had data

Components scored: 4 of 5

Ranking pool: Private schools in DE

Test Scores

Test score data not yet available for this school.

Student Demographics NCES PSS (SY 2021-22)

White 89.1%

Black 7.3%

Hispanic 2.2%

Asian 1.3%

Two or More 0.1%

Source: NCES Private School Survey (PSS)

Location

2501 PIKE CREEK RD, Wilmington, DE 19808

Nearby Alternatives

Families considering St Mark's High School may also want to explore other high schools in the area. ISLAMIC ACADEMY OF DELAWARE (rated 9.2/10, 3.0 miles away, in nearby Newark), which scores notably higher. Another option is Linden Hill Elementary School (rated 8.2/10, 1.1 miles away), which scores notably higher. Additionally, Heritage Elementary School (rated 8.1/10, 0.3 miles away), which scores notably higher. For more schools in Wilmington, see our Wilmington schools guide .

Nearby Schools

20 within 3.0 mi

School	Distance	Enrollment	Rating
Heritage Elementary School Wilmington	0.3 mi	493	8.1
Skyline Middle School Wilmington	0.4 mi	472	6.4
DESTINY CALLING ACADEMY Wilmington	0.7 mi	4	—
Forest Oak Elementary School Newark	0.9 mi	452	8.1
Meadowood Program Newark	1.0 mi	120	6.8
Dickinson (John) School Wilmington	1.0 mi	1,032	7.0
Linden Hill Elementary School Wilmington	1.1 mi	547	8.2
Wilson (Etta J.) Elementary School Newark	1.1 mi	275	5.7
DEVELOPING MINDS PRESCHOOL AND LEARNING CENTER Wilmington	1.4 mi	9	—
TOWLE INSTITUTE Newark	1.5 mi	48	4.4
Shue-Medill Middle School Newark	1.7 mi	807	7.2
ST JOHN THE BELOVED SCHOOL Wilmington	1.9 mi	427	5.8
Las Americas ASPIRA Academy Newark	2.3 mi	1,444	4.0
LIMESTONE HILLS DAY SCHOOL Wilmington	2.3 mi	6	—
Red Clay Early Years Program Wilmington	1.9 mi	289	7.2
Stanton Middle School Wilmington	2.0 mi	619	5.8
THE INDEPENDENCE SCHOOL Newark	2.3 mi	382	6.7
Gallaher (Robert S.) Elementary School Newark	2.6 mi	477	5.4
Brandywine Springs School Wilmington	2.5 mi	932	5.2
ISLAMIC ACADEMY OF DELAWARE Newark	3.0 mi	106	9.2

Neighborhood Census ACS (2019-2023)

Census data for ZIP 19808 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$92,883

Median Home Value

$309,700

Median Rent

$1,357/mo

Population

38,334

College Educated

41.1%

Homeownership

79.1%

Avg Commute

24.2 min

Poverty Rate

5.6%

Median Age

43.6

Community Profile

The community surrounding St Mark's High School has a median household income of $92,883. It is a well-educated community where 41% of adults hold a bachelor's degree or higher. The median home value in the area is $309,700, with a median rent of $1,357/month. The local poverty rate of 5.6% is relatively low. The average commute for residents is 24 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School	Enrollment	Rating
Early College School at Del State Dover, DE	533	5.2
Lake Forest High School Felton, DE	918	5.1
Delaware Military Academy Wilmington, DE	567	5.4
McKean (Thomas) High School Wilmington, DE	870	5.0
Delmar High School Delmar, DE	714	5.5
Seaford Senior High School Seaford, DE	833	5.5

Frequently Asked Questions

Common questions about St Mark's High School

What grades does St Mark's High School serve?

St Mark's High School serves students in grades 9th through 12th.

How many students attend St Mark's High School?

St Mark's High School has an enrollment of approximately 716 students.

What is the student-teacher ratio at St Mark's High School?

The student-teacher ratio at St Mark's High School is 13.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.

How does St Mark's High School rank in DE?

St Mark's High School is ranked #49 out of 59 private schools in DE.

What is St Mark's High School's MySchoolScout rating?

St Mark's High School has a composite rating of 5.2 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

Is St Mark's High School a private school?

Yes, St Mark's High School is a private coeducational school with a Roman Catholic affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.

Is St Mark's High School a religious school?

St Mark's High School has a Roman Catholic religious affiliation.

Explore More Schools

All schools in Wilmington, DE Schools in DE 20 nearby schools

11 schools nearby View map →

Neighborhood Context

City Safety: High (4,289/100K)

FBI UCR 2024. City-level (Wilmington). Data >1 year old.

Quick Facts NCES PSS (SY 2021-22)

Grades: 9th – 12th
Enrollment: 716
Gender Split: 46% M / 54% F
Student-Teacher Ratio: 13.8:1
Teachers (FTE): 52
Type: private
Coed Status: coed
Affiliation: Roman Catholic
School Day: 6.7 hours
Days Per Year: 180 days
Setting: Large Suburb
County: NEW CASTLE
Phone: (302) 757-8704
Data Year: 2022–2023

Resources & Links

Search for School Website ↗ Google Maps & Reviews ↗ GreatSchools Profile ↗ Niche Reviews ↗ Official NCES Data ↗

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology

Data sources

NCES PSSSY 2021-22 Census ACS2019-2023 AI description MySchoolScout Rankings2024 Full details →

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