Enrollment
423
California · 2024-25 NCES data
Elementary school (grades K-5) · Martinez, CA
John Muir Elementary
Federal NCES profile for John Muir Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 14/100.
2024-25 NCES dataElementary school (grades K-5)NCES 062403009579
👥 S:T ratio 6
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 19
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
John Muir Elementary earns 14/100 on the Resource Investment Index, with class sizes near the California median. It is also more racially and ethnically mixed than most California schools.
- #4 of 5
- elementary schools in Martinez · Resource Index
- 14
- Resource Index · Lower
- 23.5:1
- students per teacher
- 36.8%
- free-lunch eligible
John Muir Elementary has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, John Muir Elementary ranks #4 of 5 elementary schools in Martinez, CA.
School address
District: Martinez Unified · California
NCES ID 062403009579 Verify on NCES CCD record →
Teachers (FTE)
18.0
Federal CCD staff survey
Students per teacher
23.5:1
vs 21.5:1 California avg
+9% vs state
Free-lunch eligible
36.8%
vs 55.5% California avg
-34% vs state
Student-teacher ratio in context
How John Muir Elementary compares with California and U.S. medians
What stands out at John Muir Elementary
John Muir Elementary is a mid-sized elementary school in Martinez, California, enrolling 423 students.
Class loads run somewhat heavier than typical: 23.5:1 puts it in the larger third of California schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 36.8% of students eligible for free meals.
With 423 students, its enrollment sits close to the California median campus size.
Its Resource Investment Index trails 93% of the 9,998 California schools with a score on record, one of the lower results on this measure.
Among 1,210 similarly sized, similarly resourced-need California schools statewide, it ranks #1,131, in the lower tier once campus size and economic need are matched.
Its student body is led by White (41%) and Hispanic or Latino (31%), more mixed than most schools in the state (diversity index 70/100).
Counselor access is stretched at roughly 705 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 32.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Martinez's elementary schools, it stands alongside Hidden Valley Elementary (831 students): John Muir Elementary is smaller than that campus by headcount and runs leaner classes (23.5:1 vs 27.7:1).
Martinez Unified also operates Alhambra Senior High (1,028 students) and Martinez Junior High (843 students) alongside John Muir Elementary.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How John Muir Elementary compares
John Muir Elementary on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 23.5:1 | ▲ 9% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 36.8% | ▼ 34% | 55.5% | 51.7% |
| Enrollment | 423 | top 57% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
23.5:1
Leaner classes than 7% of US schools, heavier class loads than most.
423
Bigger than 51% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
36.8%
free-lunch eligible
- 34% below the California average of 55.5%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
23.5:1
students per teacher
- 9% above state mean
Top 67% in California - lower ratio than 33% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
32.4%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$14,299
per pupil, district-wide
- below California avg of $16,509
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.6 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
2
in-school suspensions + 9 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 2.6 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 41.4%
Hispanic or Latino 30.7%
Two or More 18.2%
Asian 6.6%
African American 3.1%
Largest group: White at 41.4% of enrollment.
Student-body diversity index 69.6/100
Simpson diversity index - at 69.6, John Muir Elementary is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Martinez Unified, which includes John Muir Elementary.
$14,299
Per student
-13%
vs California
Avg $16,509
-14%
vs U.S.
Avg $16,593
Revenue mix
Local 55.8%
State 37.2%
Federal 7.0%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How John Muir Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Alhambra Senior High | Larger | Similar economic need | Lower S:T ratio |
| Martinez Junior High | Larger | Similar economic need | Similar S:T ratio |
| John Swett Elementary | Larger | Lower economic need | Lower S:T ratio |
| Morello Park Elementary | Similar size | Lower economic need | Lower S:T ratio |
| Las Juntas Elementary | Similar size | Similar economic need | Lower S:T ratio |
Comparisons are relative to John Muir Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,028
- Students per teacher
- 19.4:1
- Resource Index
- 32/100
- Enrollment
- 843
- Students per teacher
- 22.8:1
- Resource Index
- 22/100
- Enrollment
- 533
- Students per teacher
- 20.5:1
- Resource Index
- 30/100
- Enrollment
- 496
- Students per teacher
- 21.6:1
- Resource Index
- 25/100
- Enrollment
- 353
- Students per teacher
- 20.8:1
- Resource Index
- 26/100
Similar elementary schools in Martinez
4 comparable elementary schools (grades K-5) serving the same city.
Hidden Valley Elementary
Standard public school
831 students 27.7:1 students per teacher
John Swett Elementary
Standard public school
533 students 20.5:1 students per teacher
Morello Park Elementary
Standard public school
496 students 21.6:1 students per teacher
Las Juntas Elementary
Standard public school
353 students 20.8:1 students per teacher
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~423 students)
Similar student-teacher ratio (~23.5:1)
Next steps
Verify locally before acting on John Muir Elementary's federal record.
- Compare John Muir Elementary against another school. Compare schools
- Martinez Unified's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about John Muir Elementary
How many students attend John Muir Elementary?
John Muir Elementary has 423 students enrolled. It is an elementary school in Martinez, CA.
What is the student-teacher ratio at John Muir Elementary?
The student-teacher ratio at John Muir Elementary is 23.5:1, which is 9% higher than the California average of 21.5:1 and 50% higher than the national average of 15.7:1.
What percentage of students receive free lunch at John Muir Elementary?
36.8% of students at John Muir Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of John Muir Elementary?
The largest demographic group at John Muir Elementary is White at 41.4% of enrollment, in Martinez, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 69.6/100.
What is the Resource Investment Index for John Muir Elementary?
John Muir Elementary has a Resource Investment Index of 14/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does John Muir Elementary rank among elementary schools in Martinez?
By Resource Investment Index, John Muir Elementary ranks #4 of 5 elementary schools in Martinez, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Martinez on the city page.
Is John Muir Elementary a good school?
John Muir Elementary earns 14/100 on the Resource Investment Index, with class sizes near the California median. It is also more racially and ethnically mixed than most California schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Martinez Unified?
Besides John Muir Elementary, Martinez Unified also operates Alhambra Senior High (1,028 students), Martinez Junior High (843 students), and John Swett Elementary (533 students). See the Martinez Unified district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.