St. Catherine of Siena School in Rialto, California is a Preschool through Eighth Grade Parish School.
It is located just south of Foothill Blvd. Our School Board is looking for new members who would like to add insight and input in the future and stability of our school.
We strive to empower our students with the ability to foster reconciliation and build community by developing an appreciation and understanding of our multi-cultural diversity.
Thus we enable students to become instruments of peace, harmony and justice.
We acknowledge one another's gifts, service to others, and the nurturing bonds of unity and love with all people.
The St. Catherine of Siena School mission calls us to educate children, to embrace their diversity, to go out into the world and live as disciples of Christ, to share faith and His Love with others, to be good stewards of our environment, and to be co-creators of His justice and peace.
Quick Facts (2026)
- Top-Ranked CA School
- Grades: Prekindergarten-8
- Enrollment: 172 students
- Acceptance rate: 99%
- Average class size: 16 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
St. Catherine Of Siena School ranks among the top 20% of private schools in California for:
Category
Attribute
Advanced Degrees
School Overview
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades Prekindergarten-8
Year Founded
1956
School Calendar
Student Body
Total Students
172 students
Student Body Type
Co-ed
% Students of Color
98%
State avg.: 51%
Students by Grade
Academics and Faculty
Total Classroom Teachers
9 teachers
Student-Teacher Ratio
19:1
National avg.:
% Faculty w/Advanced Degree
90%
Average Class Size
16 students
Matriculation DataMatric. Data
Classroom Dress Code
Formal
School Uniform
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Tuition Notes
Three payment plans available, and each can be either 10 or 12 months. Tuition assistance is available.
Acceptance Rate
99%
National avg.: 82%
Application URL
Sports
Total Sports Offered
5 sports
School Notes
- School Motto: FAITH. EXCELLENCE. CHALLENGE.
Source: Verified school update
Frequently Asked Questions
What is the acceptance rate of St. Catherine Of Siena School?
The acceptance rate of St. Catherine Of Siena School is 99%, which is higher than the national average of 81%.
What sports does St. Catherine Of Siena School offer?
St. Catherine Of Siena School offers 5 interscholastic sports: Basketball, Flag Football, Soccer, Track and Field and Volleyball.
What is St. Catherine Of Siena School's ranking?
St. Catherine Of Siena School ranks among the top 20% of private schools in California for: Highest percentage of students of color and Highest percentage of faculty with advanced degrees.
When is the application deadline for St. Catherine Of Siena School?
The application deadline for St. Catherine Of Siena School is rolling (applications are reviewed as they are received year-round).
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