St. Didacus School

14325 Astoria Street Sylmar, CA 91342
www.stdidacus.org

Quick Facts (2026-27)

  • Grades: Prekindergarten-8
  • Enrollment: 265 students
  • Acceptance rate: 99%
  • Average class size: 20 students
  • Application Deadline: None / Rolling
  • Source: National Center for Education Statistics (NCES)

Quick Facts (2026-27)

  • Grades: Prekindergarten-8
  • Enrollment: 265 students
  • Acceptance rate: 99%
  • Average class size: 20 students
  • Application Deadline: None / Rolling
  • Source: National Center for Education Statistics (NCES)

School Rankings

St. Didacus School ranks among the top 20% of private schools in California for:

Category
Attribute

School Facts

Religious Affiliation
Grades Offered
Grades Prekindergarten-8
Students By Grade
Year Founded
1958

Student Body

Total Students
265 students
Student Body Type
Co-ed
% Students of Color
98%
State avg.: 52%

Academic Profile

Total Classroom Teachers
10 teachers
Student-Teacher Ratio
27:1
National avg.: 11:1
Average Class Size
20 students
Classroom Dress Code
Formal
clothes shown on this website are not approved items.niform of slicks and polo shirt

Tuition & Financial Aid

Admission Deadline
None / Rolling
% on Financial Aid
10%
Acceptance Rate
99%
National avg.: 82%

Sports

Total Sports Offered
4 sports

Extracurriculars

Total ExtracurricularsTotal Extra-curric.
4 extracurriculars
ExtracurricularsExtra-curric.
Builder's Club - Kiwanischoir
Girl Scoutspiano

School Notes

  • The faculty of St. Didacus School views itself as Catholic educators.
  • In partnership with the parents, we prepare our students to become full and active members of the Catholic Church, to serve others and to make a difference in the world.
  • Recognizing Christ as the foundation of the whole educational process, we uphold the norms of the gospel as our educational norms.
  • All of us at St. Didacus desire to make this a true community of faith which is living, conscious, and active.
  • Cognizant of the treasury of our God-given talents, accepting one another's strengths and weaknesses, we strive to provide a climate conducive to the total formation of the child with respect to his/her ultimate goal as a Catholic.
  • The faculty of St. Didacus School views itself as Catholic educators.
  • In partnership with the parents, we prepare our students to become full and active members of the Catholic Church, to serve others and to make a difference in the world.
  • Recognizing Christ as the foundation of the whole educational process, we uphold the norms of the gospel as our educational norms.
  • All of us at St. Didacus desire to make this a true community of faith which is living, conscious, and active.
  • Cognizant of the treasury of our God-given talents, accepting one another's strengths and weaknesses, we strive to provide a climate conducive to the total formation of the child with respect to his/her ultimate goal as a Catholic.
Source: National Center for Education Statistics (NCES)

Frequently Asked Questions

What schools are St. Didacus School often compared to?
St. Didacus School is often viewed alongside schools like Santa Rosa De Lima Catholic School by visitors of our site.
What is the acceptance rate of St. Didacus School?
The acceptance rate of St. Didacus School is 99%, which is higher than the national average of 80%.
What sports does St. Didacus School offer?
St. Didacus School offers 4 interscholastic sports: Basketball, Flag Football, Softball and Volleyball.
When is the application deadline for St. Didacus School?
The application deadline for St. Didacus School is rolling (applications are reviewed as they are received year-round).

School Reviews

  5.00 out of 5  (2 reviews)
5  
Fantastic program for both religious education and an advanced academic curriculum. Last few years, the school has improved and made huge steps towards becoming the hidden gem in the valley. I recommend if you are looking and school searching, it is a must to take a tour. Sports have been upgraded and have been another team-building effort to help teach our children and help them learn the importance of discipline and integrity.
- Posted by
5  
I''ve been involved in the school for quite some time now, and have nothing but good things to say. My daughter graduated 2 yrs. ago and my Son is currently in 5thh grade, The teachers are awesome, and the administraters are extremely caring.
- Posted by

Endorse St. Didacus School. Endorsements should be a few sentences in length. Please include any comments on:

  • Quality of academic programs, teachers, and facilities
  • Availability of music, art, sports and other extracurricular activities
  • Academic or athletic awards
Endorse this school

Recent Articles

How Much Homework Is Too Much?
How Much Homework Is Too Much?
Learn how to compare private school homework expectations, recognize excessive workloads, evaluate assignment quality, and ask better questions about academic balance before choosing a school for your child.
Learning Support Without a Formal Program
Learning Support Without a Formal Program
Learn what private schools mean by informal learning support, how services differ from formal programs, and which questions families should ask before choosing the right school today.
Beyond AP vs. IB: How to Judge Academic Rigor
Beyond AP vs. IB: How to Judge Academic Rigor
Learn how to judge academic rigor at private schools without AP or IB by examining curriculum depth, assessments, faculty expectations, advanced coursework, student work, and college preparation outcomes.
School location map

Request Info

Did You Know?

The average private school tuition in Los Angeles County, CA is $18,294 for elementary schools and $23,987 for high schools (read more about average private school tuition across the country).
The average acceptance rate in Los Angeles County, CA is 79% (read more about average acceptance rates across the country).

Quick Links