Below Average

#1598 of 1,787 private schools in CA

St Didacus School

Elementary School

14325 ASTORIA ST, Sylmar, CA 91342

Last updated: July 2026

Private

Enrollment

236

Student-Teacher

23.4:1

Score

4.8

Grades

Pre-K – 8th

Enrollment

236

Student-Teacher

23.4:1

Score

4.8

Grades

Pre-K – 8th

Data vintage
2021-22

Data vintage2021-22

How this school compares

California private schools

#1,598 of 1,787

In Sylmar

#2 of 3

public schools

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About St Didacus School

St Didacus School is a private elementary school in Sylmar, CA. St Didacus School serves approximately 236 students, and covers grades Pre-K-8th, and has a 23.4:1 student-teacher ratio. St Didacus School has a current MySchoolScout rating of 4.8 out of 10 and ranks #1,598 of 1,787 private schools in CA.

How it compares1.4 pts below CA schools

4.8

This school 4.8 · Below Average
CA avg 6.2

What Parents Should Know

St Didacus School runs 23.4:1 students to teachers, above the national average. That often means bigger classes. Ask how the school supports kids who need extra help, and whether there are teaching assistants or small-group time.

St Didacus School is private, so it runs independently of the local district and sets its own curriculum. That freedom cuts both ways depending on what you want for your child. If you're considering it, start with the practical questions: tuition, financial aid, and how admissions work.

Compare to Public Schools

Beta

How St Didacus School compares to 9 public schools serving similar grades in Sylmar, CA

Student-Teacher Ratio

23.4:1

This School

19.5:1

Public Avg

Avg School Size

236

This School

528

Public Avg

Avg School Scout Rating

4.8

This School

7.2

Public Avg

Student Demographics

Hispanic 84.3% vs 0%

White 1.7% vs 0%

Black 1.3% vs 0%

Asian 1.3% vs 0%

St Didacus School Sylmar Public Avg

Nearby Elementary Schools

School	Distance	Enrollment	STR	Rating
St Didacus School (this school)	—	236	23.4:1	4.8
Dyer Street Elementary	0.4 mi	534	21.4:1	7.4
Sylmar Elementary	0.4 mi	415	18.9:1	7.9
Olive Vista Middle	0.5 mi	968	18.3:1	7.8
Sylmar Leadership Academy	0.9 mi	824	20.6:1	7.9
El Dorado Avenue Elementary	1.2 mi	352	18.5:1	6.2
Osceola Street Elementary	1.2 mi	355	20.9:1	6.8
Herrick Avenue Elementary	1.3 mi	376	17.9:1	6.1
Hubbard Street Elementary	1.3 mi	567	21:1	6.9
Harding Street Elementary	1.7 mi	358	17.9:1	7.4

Demographics sourced from NCES Private School Survey (PSS) and Common Core of Data (CCD). Comparisons are based on enrollment-weighted averages.

Score Breakdown

Preliminary

What This Rating Measures

This rating reflects classroom size, instructional time, student diversity, community resources, and school characteristics. Private schools are ranked against other private schools in CA.

Classroom Attention

C- 1.9 / 10

View breakdown

Student-Teacher Ratio 23.4:1

Instructional Commitment

A 8.9 / 10

View breakdown

School Day Length 7 hours

Annual Instructional Hours 1,330

Diversity & Inclusion

C+ 3.7 / 10

View breakdown

Diversity Index 28%

Community Context

Data Unavailable

School Profile

A- 8.1 / 10

View breakdown

Enrollment 236

View data sources

Score basis: Private school model

Data coverage: 80% of scoring components had data

Components scored: 4 of 5

Ranking pool: Private schools in CA

Test Scores

Test score data not yet available for this school.

Student Demographics NCES PSS (SY 2021-22)

Hispanic 84.3%

Two or More 11.4%

White 1.7%

Black 1.3%

Asian 1.3%

Source: NCES Private School Survey (PSS)

Location

14325 ASTORIA ST, Sylmar, CA 91342

Nearby Alternatives

Families considering St Didacus School may also want to explore other elementary schools in the area. PUC Community Charter Elementary (rated 8.7/10, 0.4 miles away, in nearby Burbank), which scores notably higher. Another option is Sylmar Elementary (rated 7.9/10, 0.4 miles away), which scores notably higher. Additionally, Sylmar Leadership Academy (rated 7.9/10, 0.9 miles away), which scores notably higher. For more schools in Sylmar, see our Sylmar schools guide .

Nearby Schools

20 within 1.2 mi

School	Distance	Enrollment	Rating
St. Didacus Sylmar	0.0 mi	272	—
Sylmar Charter High Sylmar	0.2 mi	1,508	7.5
Sylmar Biotech Health and Engineering Magnet Sylmar	0.2 mi	206	8.7
Dyer Street Elementary Sylmar	0.4 mi	534	7.4
Sylmar Elementary Sylmar	0.4 mi	415	7.9
Evergreen Continuation Sylmar	0.4 mi	79	6.1
PUC Community Charter Elementary Burbank	0.4 mi	296	8.7
Olive Vista Middle Sylmar	0.5 mi	968	7.8
POVERELLO OF ASSISI PRESCHOOL Sylmar	0.7 mi	53	2.1
Poverello of Assisi Preschool Sylmar	0.7 mi	43	—
PARK MONTESSORI CHILDREN'S CENTER Sylmar	0.7 mi	6	—
Sylmar Leadership Academy Sylmar	0.9 mi	824	7.9
PUC Triumph Charter Academy and PUC Triumph Charter High Burbank	1.0 mi	802	7.9
PUC Lakeview Charter High Burbank	1.0 mi	440	6.8
Gridley Street Elementary San Fernando	1.0 mi	480	4.0
First United Methodist Church/Glenoaks Christian Elementary School San Fernando	1.1 mi	48	—
GLENOAKS CHRISTIAN ELEMENTARY San Fernando	1.1 mi	63	5.4
Osceola Street Elementary Sylmar	1.2 mi	355	6.8
PUC Nueva Esperanza Charter Academy Burbank	1.3 mi	352	7.0
El Dorado Avenue Elementary Sylmar	1.2 mi	352	6.2

Neighborhood Census ACS (2019-2023)

Census data for ZIP 91342 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$95,480

Median Home Value

$641,100

Median Rent

$1,965/mo

Population

93,513

College Educated

20.1%

Homeownership

67.7%

Avg Commute

31.6 min

Poverty Rate

12.7%

Median Age

37.4

Similar Schools

Schools in the same state with comparable level, size, and ratings

School	Enrollment	Rating
Antioch Charter Academy Antioch, CA	207	4.8
Ferris Spanger Elementary Roseville, CA	305	4.8
Hillcrest Elementary San Francisco, CA	328	4.8
Horace Mann Elementary San Jose, CA	295	4.8
IMMACULATE CONCEPTION SCHOOL Los Angeles, CA	167	4.8
LODI CHRISTIAN SCHOOL Acampo, CA	226	4.8

Frequently Asked Questions

Common questions about St Didacus School

What grades does St Didacus School serve?

St Didacus School serves students in grades Pre-K through 8th.

How many students attend St Didacus School?

St Didacus School has an enrollment of approximately 236 students.

What is the student-teacher ratio at St Didacus School?

The student-teacher ratio at St Didacus School is 23.4:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.

How does St Didacus School rank in CA?

St Didacus School ranks #1,598 of 1,787 private schools in CA.

What is St Didacus School's MySchoolScout rating?

St Didacus School has a current MySchoolScout rating of 4.8 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.

Is St Didacus School a private school?

Yes, St Didacus School is a private coeducational school with a Roman Catholic affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.

Is St Didacus School a religious school?

St Didacus School has a Roman Catholic religious affiliation.

Explore More Schools

All schools in Sylmar, CA Schools in CA 20 nearby schools Explore Los Angeles school quality map

11 schools nearby View map →

Neighborhood Context

Walk Score: 73 Very Walkable
Transit Score: 45 Some Transit
Bike Score: 54 Bikeable

Quick Facts NCES PSS (SY 2021-22)

Grades: Pre-K – 8th
Enrollment: 236
Gender Split: 49% M / 51% F
Student-Teacher Ratio: 23.4:1
Teachers (FTE): 10
Type: private
Coed Status: coed
Affiliation: Roman Catholic
School Day: 7 hours
Days Per Year: 190 days
Setting: Large City
County: Los Angeles County
Phone: (818) 367-5886

Resources & Links

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Data sources

NCES PSSSY 2021-22 Census ACS2019-2023 MySchoolScout Rankings2024 Full details →

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