- Enrollment
- 1,948
- Students per teacher
- 25:1
- Resource Index
- 21/100
Elementary school (grades K-5) · Clayton, CA
Mt. Diablo Elementary
Federal NCES profile for Mt. Diablo Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 25/100.
2024-25 NCES dataElementary school (grades K-5)NCES 062637003959
👥 S:T ratio 0
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 71
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mt. Diablo Elementary earns 25/100 on the Resource Investment Index, with class sizes larger than 98% of California schools.
- 25
- Resource Index · Lower
- 35.2:1
- large classes for California
- 5.1%
- free-lunch eligible
- 739
- students enrolled
Mt. Diablo Elementary has class sizes larger than 98% of California schools. Computed live against every California school reporting to NCES.
School address
District: Mt. Diablo Unified · California
NCES ID 062637003959 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+45 students YoY
Mt. Diablo Elementary grew from 693 students in 2022-23 to 738 in 2023-24 (+6.5%).
Teacher FTE added 21.6 → 25.6 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+45 students YoY 062637003959 · Clayton, CA Elementary · MID · TRAD
739 enr · 35.2:1 · 5.1% lunch · RII 25
Nearest enrollment peer: College Park High (1,948 students)
Mt. Diablo Elementary grew from 693 students in 2022-23 to 738 in 2023-24 (+6.5%). Teacher FTE added 21.6 → 25.6 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Mt. Diablo Elementary in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- College Park H
College Park High
1,948 students
- Northgate High
Northgate High
1,546 students
- Mt. Diablo Hig
Mt. Diablo High
1,397 students
- Concord High
Concord High
1,137 students
- Ygnacio Valley
Ygnacio Valley High
1,059 students
- This school 739
Mt. Diablo Elementary
739 students
What this shows Mt. Diablo Elementary reports 739 students on the CCD universe file.
How Mt. Diablo Elementary compares
Mt. Diablo Elementary is a growing campus on CCD: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 35.2:1 | ▲ 64% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 5.1% | ▼ 91% | 55.5% | 51.7% |
| Enrollment | 739 | top 21% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
35.2:1
Leaner classes than 1% of US schools, heavier class loads than most.
739
Bigger than 82% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
5.1%
free-lunch eligible
- 91% below the California average of 55.5%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
35.2:1
students per teacher
- 64% above state mean
Top 98% in California - lower ratio than 2% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
11.5%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$15,273
per pupil, district-wide
- below California avg of $18,665
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.4 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 1 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.1 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 52.1%
Two or More 17.6%
Hispanic or Latino 17.3%
Asian 11.5%
African American 0.9%
Native Hawaiian / Pacific Islander 0.5%
Largest group: White at 52.1% of enrollment.
Student-body diversity index 65.4/100
Simpson diversity index - at 65.4, Mt. Diablo Elementary is more mixed than the California school average of 46.0.
Programs
District finance for Mt. Diablo Unified reports $15,273 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Mt. Diablo Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| College Park High | Larger | Higher economic need | Lower S:T ratio |
| Northgate High | Larger | Similar economic need | Lower S:T ratio |
| Mt. Diablo High | Larger | Higher economic need | Lower S:T ratio |
| Concord High | Larger | Higher economic need | Lower S:T ratio |
| Ygnacio Valley High | Larger | Higher economic need | Lower S:T ratio |
Comparisons are relative to Mt. Diablo Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,546
- Students per teacher
- 24.9:1
- Resource Index
- 23/100
- Enrollment
- 1,397
- Students per teacher
- 17.7:1
- Resource Index
- 22/100
- Enrollment
- 1,137
- Students per teacher
- 18.6:1
- Resource Index
- 27/100
- Enrollment
- 1,059
- Students per teacher
- 17.4:1
- Resource Index
- 26/100
Nationwide elementary schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~739 students)
Frequently asked questions about Mt. Diablo Elementary
How many students attend Mt. Diablo Elementary?
Mt. Diablo Elementary has 739 students enrolled. It is an elementary school in Clayton, CA. CCD year-over-year: 693 (2022-23) → 738 (2023-24), up 45.
What is the student-teacher ratio at Mt. Diablo Elementary?
The student-teacher ratio at Mt. Diablo Elementary is 35.2:1, which is 64% higher than the California average of 21.5:1 and 124% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Mt. Diablo Elementary?
5.1% of students at Mt. Diablo Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Mt. Diablo Elementary?
The largest demographic group at Mt. Diablo Elementary is White at 52.1% of enrollment, in Clayton, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 65.4/100.
What is the Resource Investment Index for Mt. Diablo Elementary?
Mt. Diablo Elementary has a Resource Investment Index of 25/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
What other schools are in Mt. Diablo Unified?
Besides Mt. Diablo Elementary, Mt. Diablo Unified also operates College Park High (1,948 students), Northgate High (1,546 students), and Mt. Diablo High (1,397 students). See the Mt. Diablo Unified district page for the complete list.