St. Mary of Ostrabrama is a historic Polish Roman Catholic church at the junction of Jackson Street and Whitehead Avenue in South River, Middlesex County, New Jersey, United States.
It was built in 1904 and added to the National Register of Historic Places on December 10, 2003.
Quick Stats (2025)
- Top Ranked NJ School
- Grades: Nursery/Preschool-1
- Enrollment: 47 students
- Application Deadline: None / Rolling
- Source: National Center for Education Statistics (NCES)
Top Rankings
St. Marys Of Ostrabrama ranks among the top 20% of private schools in New Jersey for:
Category
Attribute
School History
School Overview
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades Nursery/Preschool-1
Year Founded
1902
School Calendar
First Day of School
Mon. Sep 1, 2025
Last Day of School
Mon. May 25, 2026
Student Body
Total Students
47 students
Student Body Type
Co-ed
% Students of Color
21%
State avg.: 39%
Students by Grade

Academics and Faculty
Total Classroom Teachers
4 teachers
Student : Teacher Ratio
12:1
National avg.: 13:1
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Application URL
School Notes
- School Motto: Our Lady of Mercy - Pray For Us
Source: National Center for Education Statistics (NCES)
Frequently Asked Questions
What is St. Marys Of Ostrabrama's ranking?
St. Marys Of Ostrabrama ranks among the top 20% of private schools in New Jersey for: Oldest founding date.
When is the application deadline for St. Marys Of Ostrabrama?
The application deadline for St. Marys Of Ostrabrama is rolling (applications are reviewed as they are received year-round).
School Reviews
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