Enrollment
1,033
California · 2024-25 NCES data
High school (grades 9-12) · El Dorado, CA
Union Mine High
Federal NCES profile for Union Mine High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 41/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 061207007957
👥 S:T ratio 12
📚 AP courses 70
🌟 Gifted program 70
🎓 Counselors 48
📋 Attendance 3
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Union Mine High earns 41/100 on the Resource Investment Index, with class sizes near the California median.
- #3 of 3
- public schools in El Dorado · Resource Index
- 41
- Resource Index · Typical
- 22:1
- students per teacher
- 37.0%
- free-lunch eligible
Union Mine High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Union Mine High ranks #3 of 3 public schools in El Dorado, CA.
School address
District: El Dorado Union High · California
NCES ID 061207007957 Verify on NCES CCD record →
Teachers (FTE)
47.0
Federal CCD staff survey
Students per teacher
22:1
vs 21.5:1 California avg
+2% vs state
Free-lunch eligible
37.0%
vs 55.5% California avg
-33% vs state
Student-teacher ratio in context
How Union Mine High compares with California and U.S. medians
What stands out at Union Mine High
Union Mine High is a large high school in El Dorado, California, enrolling 1,033 students.
At 22:1, its student-teacher ratio sits close to the California median, within a few percentage points of the 21.5:1 state norm, neither notably crowded nor notably small.
Economic need runs somewhat below the state's typical profile, with 37.0% of students eligible for free meals.
Enrollment of 1,033 puts it in the larger third of California schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 774 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #306.
Its student body is led by White (66%) and Hispanic or Latino (25%) (diversity index 50/100).
On the academic-pipeline side it reports 14 Advanced Placement courses.
Counselor coverage runs a bit thin, about 258 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Chronic absenteeism is elevated: 38.8% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding El Dorado Union High spends $13,233 per pupil, 20% below the California average, a leaner-resourced district than most.
The federal civil-rights collection also records 2 expulsions at this campus for 2021-22.
Among El Dorado's high schools, it stands alongside Pacific Crest Academy (117 students): Union Mine High is larger than that campus by headcount and runs leaner classes (22:1 vs 23.4:1).
El Dorado Union High also operates Oak Ridge High (2,346 students) and Ponderosa High (1,675 students) alongside Union Mine High.
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 Union Mine High compares
Union Mine High on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 22:1 | ▲ 2% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 37.0% | ▼ 33% | 55.5% | 51.7% |
| Enrollment | 1,033 | top 11% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
22:1
Leaner classes than 10% of US schools, heavier class loads than most.
1,033
Bigger than 92% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
37.0%
free-lunch eligible
- 33% 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
22:1
students per teacher
- 2% above state mean
Top 53% in California - lower ratio than 47% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
38.8%
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
$13,233
per pupil, district-wide
- below California avg of $16,509
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors4.0 FTE
Per 258 students, the combined health-and-guidance staffing load for this school.
Discipline context
8
in-school suspensions + 101 out-of-school
Suspension rate: 0.8 per 100 students. Combined in-school and out-of-school rate: 10.6 per 100 students. Reported via the Civil Rights Data Collection. Includes 2 expulsions.
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 65.9%
Hispanic or Latino 24.8%
Two or More 6.0%
American Indian / Alaska Native 1.4%
Asian 1.0%
African American 0.8%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 65.9% of enrollment.
Student-body diversity index 50.0/100
Simpson diversity index - at 50.0, Union Mine High is more mixed than the California school average of 46.0.
Programs
AP courses offered 14
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for El Dorado Union High, which includes Union Mine High.
$13,233
Per student
-20%
vs California
Avg $16,509
-20%
vs U.S.
Avg $16,593
Revenue mix
Local 49.7%
State 43.5%
Federal 6.8%
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 Union Mine High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Oak Ridge High | Larger | Lower economic need | Higher S:T ratio |
| Ponderosa High | Larger | Lower economic need | Similar S:T ratio |
| El Dorado High | Similar size | Similar economic need | Lower S:T ratio |
| Pacific Crest Academy | Smaller | Lower economic need | Similar S:T ratio |
| Independence Continuation | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Union Mine High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,346
- Students per teacher
- 23.5:1
- Resource Index
- 38/100
- Enrollment
- 1,675
- Students per teacher
- 23.3:1
- Resource Index
- 26/100
- Enrollment
- 1,135
- Students per teacher
- 19.9:1
- Resource Index
- 22/100
- Enrollment
- 117
- Students per teacher
- 23.4:1
- Resource Index
- 52/100
- Enrollment
- 104
- Students per teacher
- 14.9:1
- Resource Index
- 50/100
Similar high schools in El Dorado
1 comparable high schools (grades 9-12) serving the same city.
Similar high 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 (~1,033 students)
Similar student-teacher ratio (~22:1)
Next steps
Verify locally before acting on Union Mine High's federal record.
- Compare Union Mine High against another school. Compare schools
- El Dorado Union High'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 Union Mine High
How many students attend Union Mine High?
Union Mine High has 1,033 students enrolled. It is a high school in El Dorado, CA.
What is the student-teacher ratio at Union Mine High?
The student-teacher ratio at Union Mine High is 22:1, which is 2% higher than the California average of 21.5:1 and 40% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Union Mine High?
37.0% of students at Union Mine High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Union Mine High?
The largest demographic group at Union Mine High is White at 65.9% of enrollment, in El Dorado, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 50.0/100.
What is the Resource Investment Index for Union Mine High?
Union Mine High has a Resource Investment Index of 41/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Union Mine High rank among public schools in El Dorado?
By Resource Investment Index, Union Mine High ranks #3 of 3 public schools in El Dorado, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in El Dorado on the city page.
Is Union Mine High a good school?
Union Mine High earns 41/100 on the Resource Investment Index, with class sizes near the California median. 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 El Dorado Union High?
Besides Union Mine High, El Dorado Union High also operates Oak Ridge High (2,346 students), Ponderosa High (1,675 students), and El Dorado High (1,135 students). See the El Dorado Union High 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.