Enrollment
861
California · 2024-25 NCES data
Middle school (grades 6-8) · Concord, CA
El Dorado Middle
Federal NCES profile for El Dorado Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 14/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 062637003944
👥 S:T ratio 0
🌟 Gifted program 30
🎓 Counselors 14
📋 Attendance 12
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
El Dorado Middle earns 14/100 on the Resource Investment Index, with class sizes larger than 86% of California schools.
- #3 of 3
- middle schools in Concord · Resource Index
- 14
- Resource Index · Lower
- 26.1:1
- large classes for California
- 58.8%
- free-lunch eligible
El Dorado Middle has class sizes larger than 86% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, El Dorado Middle ranks #3 of 3 middle schools in Concord, CA.
School address
District: Mt. Diablo Unified · California
NCES ID 062637003944 Verify on NCES CCD record →
Teachers (FTE)
33.0
Federal CCD staff survey
Students per teacher
26.1:1
vs 21.5:1 California avg
+21% vs state
Free-lunch eligible
58.8%
vs 55.5% California avg
+6% vs state
Student-teacher ratio in context
How El Dorado Middle compares with California and U.S. medians
What stands out at El Dorado Middle
El Dorado Middle is a higher-need, large middle school in Concord, California, enrolling 861 students.
Class loads run heavy: 26.1:1 is larger than about 86% of California schools and 21% above the 21.5:1 state mean, so each teacher carries more students than is typical.
Its free-meal eligibility rate of 58.8% lands close to the California typical range, neither a high- nor low-need campus by this measure.
Enrollment of 861 puts it in the larger third of California schools by headcount.
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 1,172 similarly sized, similarly resourced-need California schools statewide, it ranks #981, in the lower tier once campus size and economic need are matched.
Its student body is led by Hispanic or Latino (57%) and White (16%) (diversity index 63/100).
Counselor access is stretched at roughly 431 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 35.2% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Concord's middle schools, it stands alongside Oak Grove Middle (681 students): El Dorado Middle is larger than that campus by headcount and runs heavier classes (26.1:1 vs 22:1).
Mt. Diablo Unified also operates College Park High (1,948 students) and Northgate High (1,546 students) alongside El Dorado Middle.
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 El Dorado Middle compares
El Dorado Middle on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 26.1:1 | ▲ 21% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 58.8% | ▲ 6% | 55.5% | 51.7% |
| Enrollment | 861 | top 15% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
26.1:1
Leaner classes than 4% of US schools, heavier class loads than most.
861
Bigger than 88% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
58.8%
free-lunch eligible
- 6% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
26.1:1
students per teacher
- 21% above state mean
Top 86% in California - lower ratio than 14% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
35.2%
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
$13,649
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
Counselors2.0 FTE
Per 431 students, the combined health-and-guidance staffing load for this school.
Discipline context
28
in-school suspensions + 49 out-of-school
Suspension rate: 3.3 per 100 students. Combined in-school and out-of-school rate: 8.9 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
Hispanic or Latino 56.8%
White 16.1%
Asian 11.1%
Two or More 10.6%
African American 2.8%
Native Hawaiian / Pacific Islander 2.4%
American Indian / Alaska Native 0.1%
Largest group: Hispanic or Latino at 56.8% of enrollment.
Student-body diversity index 62.7/100
Simpson diversity index - at 62.7, El Dorado Middle is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Mt. Diablo Unified, which includes El Dorado Middle.
$13,649
Per student
-17%
vs California
Avg $16,509
-18%
vs U.S.
Avg $16,593
Revenue mix
Local 46.6%
State 43.9%
Federal 9.4%
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 El Dorado Middle Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| College Park High | Larger | Lower economic need | Similar S:T ratio |
| Northgate High | Larger | Lower economic need | Similar S:T ratio |
| Mt. Diablo High | Larger | Similar economic need | Lower S:T ratio |
| Concord High | Larger | Lower economic need | Lower S:T ratio |
| Ygnacio Valley High | Similar size | Higher economic need | Lower S:T ratio |
Comparisons are relative to El Dorado Middle's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,948
- Students per teacher
- 25:1
- Resource Index
- 21/100
- 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
Similar middle schools in Concord
2 comparable middle schools (grades 6-8) serving the same city.
Similar middle 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 (~861 students)
Similar student-teacher ratio (~26.1:1)
Next steps
Verify locally before acting on El Dorado Middle's federal record.
- Compare El Dorado Middle against another school. Compare schools
- Mt. Diablo 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 El Dorado Middle
How many students attend El Dorado Middle?
El Dorado Middle has 861 students enrolled. It is a middle school in Concord, CA.
What is the student-teacher ratio at El Dorado Middle?
The student-teacher ratio at El Dorado Middle is 26.1:1, which is 21% higher than the California average of 21.5:1 and 66% higher than the national average of 15.7:1.
What percentage of students receive free lunch at El Dorado Middle?
58.8% of students at El Dorado Middle are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of El Dorado Middle?
The largest demographic group at El Dorado Middle is Hispanic or Latino at 56.8% of enrollment, in Concord, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 62.7/100.
What is the Resource Investment Index for El Dorado Middle?
El Dorado Middle 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 El Dorado Middle rank among middle schools in Concord?
By Resource Investment Index, El Dorado Middle ranks #3 of 3 middle schools in Concord, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all middle schools in Concord on the city page.
Is El Dorado Middle a good school?
El Dorado Middle earns 14/100 on the Resource Investment Index, with class sizes larger than 86% of 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 Mt. Diablo Unified?
Besides El Dorado Middle, 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.
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.