Excellent
#17 of 388 private schools in MA
Top 4% of private schools
St Mark's School
High School
25 MARLBORO RD, Southborough, MA 01772
Enrollment
375
Student-Teacher
5.7:1
Score
8.2
Grades
9th – 12th
Enrollment
375
Student-Teacher
5.7:1
Score
8.2
Grades
9th – 12th
Data vintage
2021-22
Data vintage2021-22
How this school compares
Massachusetts private schools
#17 of 388
In Southborough
#1 of 3
public schools
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St Mark's School
High School in Southborough · grades 9th – 12th. Start here, then compare fit against nearby and district options.
Fay School
0.3 mi away. Use as a geographic alternative in the same move search.
Albert S. Woodward Memorial School
0.4 mi away. Use as a geographic alternative in the same move search.
About St Mark's School
St Mark's School is a private high school in Southborough, MA. St Mark's School serves approximately 375 students, and covers grades 9th-12th, and has a 5.7:1 student-teacher ratio. St Mark's School has a current MySchoolScout rating of 8.2 out of 10 and ranks #17 of 388 private schools in MA.
- This school 8.2 · Excellent
- MA avg 6.4
What Parents Should Know
At 5.7:1 students to teachers, St Mark's School sits well below the national average. Smaller classes like that usually mean more one-on-one time between students and teachers.
St Mark's School is private, so it runs independently of the local district and sets its own curriculum. That freedom cuts both ways depending on what you want for your child. If you're considering it, start with the practical questions: tuition, financial aid, and how admissions work.
Compare to Public Schools
BetaHow St Mark's School compares to the 4 public schools in Southborough, MA
Student Demographics
All Schools in Southborough
| School | Rating |
|---|---|
| St Mark's School (this school) | 8.2 |
| Albert S. Woodward Memorial School | 8.2 |
| P Brent Trottier | 8.6 |
| Margaret A Neary | 7.5 |
| Mary E Finn School | 7.5 |
Demographics sourced from NCES Private School Survey (PSS) and Common Core of Data (CCD). Comparisons are based on enrollment-weighted averages.
Score Breakdown
PreliminaryWhat 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 MA.
Data Unavailable
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 MA
Test Scores
Test score data not yet available for this school.
Student Demographics NCES PSS (SY 2021-22)
Source: NCES Private School Survey (PSS)
Location
25 MARLBORO RD, Southborough, MA 01772
Nearby Alternatives
Families considering St Mark's School may also want to explore other high schools in the area. Advanced Math and Science Academy Charter School (rated 7.1/10, 3.0 miles away, in nearby Marlborough), a more accessible option. Another option is GLENHAVEN ACADEMY (rated 7.0/10, 2.0 miles away, in nearby Marlborough), a more accessible option. Additionally, Assabet Valley Vocational High School (rated 6.6/10, 4.5 miles away, in nearby Marlborough), a more accessible option. For more schools in Southborough, see our Southborough schools guide .
Nearby Schools
20 within 4.2 mi| School | Distance | Rating |
|---|---|---|
| FAY SCHOOL Southborough | 0.3 mi | 7.4 |
| Albert S. Woodward Memorial School Southborough | 0.4 mi | 8.2 |
| P Brent Trottier Southborough | 0.9 mi | 8.6 |
| Margaret A Neary Southborough | 1.0 mi | 7.5 |
| GLENHAVEN ACADEMY Marlborough | 2.0 mi | 7.0 |
| THE NEW ENGLAND CENTER FOR CHILDREN Southborough | 1.8 mi | 7.7 |
| Mary E Finn School Southborough | 2.4 mi | 7.5 |
| Francis J Kane Marlborough | 2.4 mi | 6.0 |
| Early Childhood Center Marlborough | 2.9 mi | 3.3 |
| 1 LT Charles W. Whitcomb School Marlborough | 3.5 mi | 3.8 |
| THE COTTAGE CHILDRENS CENTER Marlborough | 3.4 mi | — |
| Advanced Math and Science Academy Charter School Marlborough | 3.0 mi | 7.1 |
| Richer Marlborough | 3.1 mi | 2.4 |
| Marlborough High Marlborough | 3.8 mi | 6.0 |
| Goodnow Brothers Elementary School Marlborough | 3.8 mi | 7.1 |
| Charles Jaworek School Marlborough | 4.0 mi | 3.8 |
| Brophy Framingham | 3.4 mi | 3.7 |
| REED ACADEMY Framingham | 3.5 mi | — |
| Assabet Valley Vocational High School Marlborough | 4.5 mi | 6.6 |
| METROWEST CHRISTIAN ACADEMY Ashland | 4.2 mi | 4.5 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 01772 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$196,680
Median Home Value
$816,500
Median Rent
$2,425/mo
Population
9,781
College Educated
75.4%
Homeownership
89.4%
Avg Commute
32.8 min
Poverty Rate
4.1%
Median Age
43.3
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Maynard High Maynard, MA | 8.1 |
| THE NEWMAN SCHOOL Boston, MA | 8.1 |
| Bromfield Harvard, MA | 8.3 |
| Wahconah Regional High Dalton, MA | 8.0 |
| BEAVER COUNTRY DAY SCHOOL Chestnut Hill, MA | 7.9 |
| Lenox Memorial High Lenox, MA | 7.7 |
Frequently Asked Questions
Common questions about St Mark's School
What grades does St Mark's School serve?
St Mark's School serves students in grades 9th through 12th.
How many students attend St Mark's School?
St Mark's School has an enrollment of approximately 375 students.
What is the student-teacher ratio at St Mark's School?
The student-teacher ratio at St Mark's School is 5.7:1. 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 School rank in MA?
St Mark's School ranks #17 of 388 private schools in MA.
What is St Mark's School's MySchoolScout rating?
St Mark's School has a current MySchoolScout rating of 8.2 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
Is St Mark's School a private school?
Yes, St Mark's School is a private coeducational school with a Episcopal 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 School a religious school?
St Mark's School has a Episcopal religious affiliation.
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Neighborhood Context
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Quick Facts NCES PSS (SY 2021-22)
- Grades
- 9th – 12th
- Enrollment
- 375
- Gender Split
- 51% M / 49% F
- Student-Teacher Ratio
- 5.7:1
- Teachers (FTE)
- 65
- Type
- private
- Coed Status
- coed
- Affiliation
- Episcopal
- School Day
- 7 hours
- Days Per Year
- 180 days
- Setting
- Large Suburb
- County
- Worcester County
- Phone
- (508) 786-6104
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