St. Pius X - St. Matthias High School
Independent Catholic school · Grades 9–12
Downey, CA
7851 Gardendale St, Downey, CA 90242
Overall grade: B+
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- B+Class size
- ACollege-going
- BYears serving families
- A-Diversity
What stands out
- The only Catholic school in Downey
- 98% of graduates go to four-year colleges
- Growing: enrollment up 30% since 2019–20
St. Pius X - St. Matthias High School is an independent Catholic school in Downey, California, for students from 9th grade through 12th grade. It has about 561 students and around 15 students per teacher. Enrollment has grown about 30% since 2019–20. The school is part of the Archdiocese of Los Angeles. The school reports that about 98% of its graduates go on to four-year colleges. Students attend about 7 hours a day, 180 days a year.
At a glance
- Grades
- Grades 9–12
- Students
- 561
- Teachers
- 36.4 (full-time equivalent)
- Students per teacher
- 15.4
- Boys and girls
- Coed · 272 girls, 289 boys
- Religious affiliation
- Catholic · Independent Catholic school
- Diocese
- Archdiocese of Los Angeles
- School day
- About 7 hours
- School year
- 180 days
- Graduates going to 4-year colleges
- About 98% (the school's estimate for the class before the survey)
- Library
- Yes
Reviews
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How it compares
- Larger than 59% of Catholic high schools in California.
- Compared with 86 Catholic high schools in California.
Students by survey year
Total students reported in official records since 2019–20.
Students by grade
Student body
Questions to ask on a tour
- What is tuition, and what does it include (books, fees, uniforms, trips)?
- Do you offer financial aid, sibling discounts or payment plans?
- Do you accept ESA, voucher or tax-credit scholarship funds?
- How big are classes in my child's grade?
- What support is there for students who need extra help or more challenge?
- Is the school accredited, and by whom?
- What do a typical day and a typical week look like?
- How does the school communicate with families?
Questions about St. Pius X - St. Matthias High School
What grades does St. Pius X - St. Matthias High School serve?
St. Pius X - St. Matthias High School serves grades 9–12.
How many students attend St. Pius X - St. Matthias High School?
About 561 students, with 15 students per teacher, according to official records.
How much is tuition at St. Pius X - St. Matthias High School?
Call the school to ask about tuition, financial aid and payment plans.
Official record · Updated October 2026 · Official search · Something wrong? Tell us
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