St. Gregory School
Diocesan school · Grades K–8
San Mateo, CA
2701 Hacienda St, San Mateo, CA 94403
Overall grade: B+
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- B+Class size
- B+Years serving families
- A+Diversity
What stands out
- One of 5 Catholic schools in San Mateo
In San Mateo, California, St. Gregory School is a Catholic diocesan school for students from kindergarten through 8th grade. About 297 students attend, with roughly 19 students per teacher. The school is part of the Archdiocese of San Francisco. The school day runs about 7 hours, 180 days a year.
At a glance
- Grades
- Grades K–8
- Students
- 297
- Teachers
- 15.6 (full-time equivalent)
- Students per teacher
- 19
- Boys and girls
- Coed · 138 girls, 159 boys
- Religious affiliation
- Catholic · Diocesan school
- Diocese
- Archdiocese of San Francisco
- School day
- About 7 hours
- School year
- 180 days
Reviews
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How it compares
- Larger than 80% of Catholic elementary schools in California.
- Compared with 416 Catholic elementary schools in California.
Students by survey year
Total students reported in official records since 2011–12.
Students by grade
Student body
Member of
- National Catholic Educational Association
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. Gregory School
What grades does St. Gregory School serve?
St. Gregory School serves grades K–8.
How many students attend St. Gregory School?
About 297 students, with 19 students per teacher, according to official records.
How much is tuition at St. Gregory 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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