Hillside School Photo - Heading off to the academic building after breakfast.

Best Marlborough Private High Schools (2026)

For the 2026 school year, there are 3 private high schools serving 296 students in Marlborough, MA.
The top-ranked private high school in Marlborough, MA is Hillside School.
The average acceptance rate is 60%, which is lower than the Massachusetts private high school average acceptance rate of 62%.

Top-Ranked Marlborough Private High Schools (2026)

School
Location
Quick Facts
New England Innovation Academy
New England Innovation Academy Photo
Special Program Emphasis
280 Locke Drive
Marlborough, MA 01752
(508) 205-4270
Gr: 6-12 | 116 students Avg. class size: 12 students Sports: 8 | Extracurrculars: 17 Tuition & acceptance rate listed
Hillside School
Hillside School Photo - Hillside School is located on 150 acres of land that is 45 minutes from Boston and 20 minutes from Worcester.
All-boys
404 Robin Hill Street
Marlborough, MA 01752
(508) 485-3483
Gr: K-9 | 145 students Avg. class size: 12 students Sports: 16 | Extracurrculars: 8 Tuition & acceptance rate listed
Glenhaven Academy
Special Education School
56 Framingham Rd 58
Marlborough, MA 01752
(508) 745-9462
Gr: 6-12 | 35 students
[+] Show Closed Private Schools in Marlborough, Massachusetts

Marlborough, Massachusetts Private Schools (Closed)

School
Location
Quick Facts
19 Forest St
Marlborough, MA 01752
(866) 202-8593
Gr: NS-K
25 Washington Ct
Marlborough, MA 01752
(508) 460-3400
Gr: PK-8 | 156 students
St. Anne Montessori School (Closed 2013)
Montessori School (Catholic)
720 Boston Post Road East
Marlborough, MA 01752
(508) 597-1416
Gr: PK-K | 36 students Avg. class size: 36 students Tuition listed

Overview

This Town (Marlborough)
This State (MA)
# Schools
3 Schools

Student Body:

# Students
296 Students
57,284 Students
% Average Students of Color
19%
27%

Academics and Faculty:

# Teachers
5 Teachers
8,497 Teachers
Average Student-Teacher Ratio
7:1
6:1
% Average Faculty w/Advanced Degree
57%
71%
Average Class Size
12 students
12 students

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$46,500
$40,565
Average % on Financial Aid
40%
39%
Average Financial Aid Grant
$25,000
$28,097
Average Acceptance Rate
60%
62%
Average Endowment Size
$5 million
$112.5 million

Students by Ethnicity:

0.62
0.52
# American Indian Students
n/a
127 Students
% American Indian Students
n/a
n/a
# Asian Students
13 Students
4,063 Students
% Asian Students
7%
7%
# Hispanic Students
8 Students
3,645 Students
% Hispanic Students
4%
6%
# Black Students
16 Students
3,816 Students
% Black Students
9%
7%
# White Students
102 Students
39,391 Students
% White Students
57%
67%
# Hawaiian Students
1 Student
35 Students
% Hawaiian Students
1%
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
40 Students
7,492 Students
% of Others Students
22%
13%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
13 extracurriculars
20 extracurriculars
Average Number of Sports
12 sports
12 sports

Frequently Asked Questions

What are the top-ranked private high schools in Marlborough, MA?
The top-ranked private high schools in Marlborough, MA is Hillside School.
How many private high schools are located in Marlborough?
3 private high schools are located in Marlborough.

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