Very Good
#228 of 1,787 private schools in CA
Top 13% of private schools
St Catherine of Siena School
Elementary School
604 MELLUS ST, Martinez, CA 94553
Enrollment
119
Student-Teacher
10.8:1
Score
7.5
Grades
Pre-K – 8th
Enrollment
119
Student-Teacher
10.8:1
Score
7.5
Grades
Pre-K – 8th
Data vintage
2021-22
Data vintage2021-22
How this school compares
California private schools
#228 of 1,787
Shortlisting around St Catherine of Siena School?
Use this profile as one decision point, then compare nearby options, source confidence, and commute fit before picking a neighborhood around it.
Shortlist starter
Start with these real page-level signals, then use the full table and map below.
St Catherine of Siena School
Elementary School in Martinez · grades Pre-K – 8th. Start here, then compare fit against nearby and district options.
St. Catherine of Siena
0.0 mi away. Use as a geographic alternative in the same move search.
Vicente Martinez High
0.2 mi away. Use as a geographic alternative in the same move search.
About St Catherine of Siena School
St Catherine of Siena School is a private elementary school in Martinez, CA. St Catherine of Siena School serves approximately 119 students, and covers grades Pre-K-8th, and has a 10.8:1 student-teacher ratio. St Catherine of Siena School has a current MySchoolScout rating of 7.5 out of 10 and ranks #228 of 1,787 private schools in CA.
- This school 7.5 · Very Good
- CA avg 6.2
What Parents Should Know
At 119 students, St Catherine of Siena School is on the smaller side. That usually buys more individual attention and teachers who know every kid by name, with the trade-off of fewer electives and extracurriculars than a larger school can staff. Ask what activities it actually offers.
St Catherine of Siena 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
BetaHow St Catherine of Siena School compares to 8 public schools serving similar grades in Martinez, CA
Student Demographics
Nearby Elementary Schools
| School | Rating |
|---|---|
| St Catherine of Siena School (this school) | 7.5 |
| Briones (Alternative) | 4.9 |
| Martinez Junior High | 5.5 |
| John Muir Elementary | 6.9 |
| Morello Park Elementary | 8.0 |
| Las Juntas Elementary | 3.7 |
| John Swett Elementary | 5.9 |
| Mt. McKinley | 5.4 |
| Hidden Valley Elementary | 4.5 |
Demographics sourced from NCES Private School Survey (PSS) and Common Core of Data (CCD). Comparisons are based on enrollment-weighted averages.
Score Breakdown
PreliminaryWhat 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.
Data Unavailable
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)
Source: NCES Private School Survey (PSS)
Location
604 MELLUS ST, Martinez, CA 94553
Nearby Alternatives
Families considering St Catherine of Siena School may also want to explore other elementary schools in the area. Morello Park Elementary (rated 8.0/10, 2.2 miles away), which scores slightly higher. Another option is John Muir Elementary (rated 6.9/10, 1.3 miles away), with a comparable rating. Additionally, Robert Semple Elementary (rated 6.5/10, 3.2 miles away, in nearby Benicia), with a comparable rating. For more schools in Martinez, see our Martinez schools guide .
Nearby Schools
20 within 4.3 mi| School | Distance | Rating |
|---|---|---|
| St. Catherine of Siena Martinez | 0.0 mi | — |
| Vicente Martinez High Martinez | 0.2 mi | 6.9 |
| Briones (Alternative) Martinez | 0.2 mi | 4.9 |
| BUILDING Connections Academy Martinez Martinez | 0.2 mi | — |
| Martinez Junior High Martinez | 0.3 mi | 5.5 |
| Alhambra Senior High Martinez | 0.9 mi | 6.3 |
| WOODBRIDGE CHILDREN'S CENTER - JOHN MUIR Martinez | 1.3 mi | — |
| John Muir Elementary Martinez | 1.3 mi | 6.9 |
| John Swett Elementary Martinez | 2.3 mi | 5.9 |
| ST DOMINIC ELEMENTARY SCHOOL Benicia | 2.5 mi | 5.9 |
| Community Day Benicia | 2.6 mi | — |
| Morello Park Elementary Martinez | 2.2 mi | 8.0 |
| Liberty High Benicia | 2.6 mi | 5.5 |
| Las Juntas Elementary Martinez | 2.3 mi | 3.7 |
| Robert Semple Elementary Benicia | 3.2 mi | 6.5 |
| Mt. McKinley Martinez | 3.1 mi | 5.4 |
| Hidden Valley Elementary Martinez | 3.3 mi | 4.5 |
| Mary Farmar Elementary Benicia | 3.9 mi | 6.2 |
| Benicia High Benicia | 4.1 mi | 7.4 |
| Benicia Middle Benicia | 4.3 mi | 5.8 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 94553 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$121,023
Median Home Value
$781,400
Median Rent
$2,247/mo
Population
48,600
College Educated
41.9%
Homeownership
71.8%
Avg Commute
30.5 min
Poverty Rate
7.6%
Median Age
42.3
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| BEECHWOOD SCHOOL Menlo Park, CA | 7.5 |
| Geyserville Elementary Geyserville, CA | 7.5 |
| MARIA MONTESSORI SCHOOL San Diego, CA | 7.5 |
| MCDOWELL SCHOOL Laguna Niguel, CA | 7.5 |
| Montague Elementary Montague, CA | 7.5 |
| OLD ORCHARD SCHOOL Campbell, CA | 7.5 |
Frequently Asked Questions
Common questions about St Catherine of Siena School
What grades does St Catherine of Siena School serve?
St Catherine of Siena School serves students in grades Pre-K through 8th.
How many students attend St Catherine of Siena School?
St Catherine of Siena School has an enrollment of approximately 119 students.
What is the student-teacher ratio at St Catherine of Siena School?
The student-teacher ratio at St Catherine of Siena School is 10.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.
How does St Catherine of Siena School rank in CA?
St Catherine of Siena School ranks #228 of 1,787 private schools in CA.
What is St Catherine of Siena School's MySchoolScout rating?
St Catherine of Siena School has a current MySchoolScout rating of 7.5 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
Is St Catherine of Siena School a private school?
Yes, St Catherine of Siena 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 Catherine of Siena School a religious school?
St Catherine of Siena School has a Roman Catholic religious affiliation.
Neighborhood Context
Powered by 
Quick Facts NCES PSS (SY 2021-22)
- Grades
- Pre-K – 8th
- Enrollment
- 119
- Gender Split
- 58% M / 42% F
- Student-Teacher Ratio
- 10.8:1
- Teachers (FTE)
- 11
- Type
- private
- Coed Status
- coed
- Affiliation
- Roman Catholic
- School Day
- 7 hours
- Days Per Year
- 180 days
- Setting
- Large Suburb
- County
- Contra Costa County
- Phone
- (925) 228-4140
Resources & Links
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateRelated reading
- Best Elementary Schools in America: 2026 Rankingsbest schools
- Best Public Schools in California 2026: Top-Ranked Elementary, Middle & High Schoolsbest schools
- Best School Districts to Move To in 2026: A Data-Driven Guidebest schools
- Best Schools in Los Angeles, CA — 2026 Rankingsbest schools
- Best Schools in San Diego, CA — 2026 Rankingsbest schools
Get school insights in your inbox
New rankings, best-schools lists, and parent guides — delivered free. No spam, unsubscribe anytime.
We respect your privacy. Unsubscribe at any time.