Private School Review - Established 2003
New England Innovation Academy Top 3 · Highest % Faculty w/ Adv. Degrees (MA)
Hillside School

Marlborough Private High Schools

For the 2026-27 school year, there are 3 private high schools serving 286 students in Marlborough, MA.
The average acceptance rate is 60%, which is higher than the Massachusetts private high school average acceptance rate of 56%.

Quick Facts (26-27)

Quick Facts (26-27)

Top Ranked Marlborough Private High Schools (2026-27)

New England Innovation Academy Photo
New England Innovation Academy
Gr: 6-12 | 106 students
Avg. class size: 7 students
Sports: 8 | Extracurriculars: 17
Specialized Curriculum
280 Locke Drive
Marlborough, MA 01752
(508) 205-4270
View Profile
Hillside School Photo
Hillside School
Gr: K-9 | 145 students
Avg. class size: 12 students
Sports: 16 | Extracurriculars: 8
All-boys
404 Robin Hill Street
Marlborough, MA 01752
(508) 485-3483
View Profile
Map of Glenhaven Academy
Glenhaven Academy
Gr: 6-12 | 35 students
Special Education School
56 Framingham Rd 58
Marlborough, MA 01752
(508) 745-9462
View Profile
[+] Show Closed Private Schools in Marlborough, Massachusetts

Marlborough, Massachusetts Private Schools (Closed)

Map of Guidepost Montessori at Marlborough
Guidepost Montessori at Marlborough
Gr: NS-K
Montessori School
19 Forest St
Marlborough, MA 01752
(866) 202-8593
View Profile
Map of Immaculate Conception School
Immaculate Conception School
Gr: PK-8 | 156 students
Catholic
25 Washington Ct
Marlborough, MA 01752
(508) 460-3400
View Profile
Map of St. Anne Montessori School
St. Anne Montessori School
Gr: PK-K | 36 students
Avg. class size: 36 students
Montessori School (Catholic)
720 Boston Post Road East
Marlborough, MA 01752
(508) 597-1416
View Profile

Marlborough, MA Private School Trends

3
Private Schools
286
Students
$46,500
Avg. Tuition
10
Avg. Class Size
28%
Students of Color
7:1
Student-Teacher Ratio
Download town snapshot (private high schools): CSV | XML | JSON Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission.
Enrollment & Diversity
Category
This Town (Marlborough)
This State (MA)
# Schools
3 Schools
261 Schools
# Students
286 Students
56,881 Students
% Students of Color
28%
28%
0.62
0.52
Show more data/charts: racial breakdown
# American Indian Students
0 Students
127 Students
% American Indian Students
0%
<1%
# 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%
<1%
# Others Students
40 Students
7,367 Students
% of Others Students
22%
13%
All Ethnic Groups
Academics
# Teachers
5 Teachers
8,583 Teachers
Average Student-Teacher Ratio
7:1
6:1
% Average Faculty w/Advanced Degree
66%
72%
Average Class Size
10 students
12 students
Tuition & Aid
Average Yearly Tuition Cost
$46,500
$42,576
Average % on Financial Aid
40%
40%
Average Financial Aid Grant
$25,000
$28,912
Average Endowment Size
$5 million
$134.63 million
Admissions & Athletics
Average Acceptance Rate
60%
56%
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 include New England Innovation Academy and Hillside School.
How many private high schools are located in Marlborough?
3 private high schools are located in Marlborough.

Recent Articles

When Your Child Is Excluded From Private School Events
When Your Child Is Excluded From Private School Events
Learn how to support your child when excluded from private school birthday parties and social events, recognize bullying, communicate with teachers, encourage friendships, and address repeated exclusion with confidence.
Private School Scholarship Renewal Requirements
Private School Scholarship Renewal Requirements
Learn what students must do to keep private school scholarships, including academic performance, attendance, conduct, extracurricular commitments, renewal deadlines, and how parents can protect tuition assistance throughout their education.
Private School Deposits: What If You Change Schools?
Private School Deposits: What If You Change Schools?
Learn what happens to your private school enrollment deposit when your child accepts another offer, including refund policies, contract obligations, withdrawal deadlines, and practical steps to minimize financial losses.
Area schools map

Filter Schools

School Level
Must Offer Grade
Show more
Gender
School Focus
Religious Affiliation
ADD/ADHD Support
Summer Program

Quick Links

SCHOOL SEARCH TOOLS:
SCHOOL BY TYPE (MA):
OPEN-HOUSES & JOBS:
PUBLIC & BOARDING SCHOOLS:
PRIVATE SCHOOL DATA: