Enrollment
719
California · 2024-25 NCES data
High school (grades 9-12) · Oakland, CA
Castlemont High
Federal NCES profile for Castlemont High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 062805012992
👥 S:T ratio 35
📚 AP courses 5
🌟 Gifted program 70
🎓 Counselors 28
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Castlemont High earns 28/100 on the Resource Investment Index, even as it posts class sizes smaller than 86% of California schools.
- #16 of 22
- high schools in Oakland · Resource Index
- 28
- Resource Index · Lower
- 16.3:1
- small classes for California
- 94.1%
- free-lunch eligible
Castlemont High has class sizes smaller than 86% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Castlemont High ranks #16 of 22 high schools in Oakland, CA.
School address
District: Oakland Unified · California
NCES ID 062805012992 Verify on NCES CCD record →
Teachers (FTE)
44.0
Federal CCD staff survey
Students per teacher
16.3:1
vs 21.5:1 California avg
-24% vs state
Free-lunch eligible
94.1%
vs 55.5% California avg
+70% vs state
Student-teacher ratio in context
How Castlemont High compares with California and U.S. medians
What stands out at Castlemont High
Castlemont High is a high-poverty, mid-sized high school in Oakland, California, enrolling 719 students.
Classes run notably small here: at 16.3:1, Castlemont High is leaner than roughly 86% of California schools and 24% under the state's 21.5:1 norm, more adult attention per pupil than most peers.
Economic need is high: 94.1% of students qualify for free meals, 70% above the California average, a Title I-weighted population that federal funding formulas prioritise.
Enrollment of 719 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 901 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #180.
Its student body is led by Hispanic or Latino (61%) and African American (29%) (diversity index 55/100).
On the academic-pipeline side it reports 1 Advanced Placement course.
Counselor availability sits well past the ASCA benchmark, roughly 360 students sharing each counselor, though short of the most stretched campuses.
Chronic absenteeism is elevated: 81.6% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Oakland Unified spends $20,552 per pupil, 24% above the California average, a better-resourced district than most.
The federal civil-rights collection also records 7 expulsions at this campus for 2021-22.
Among Oakland's high schools, it stands alongside Oakland Technical High (1,812 students): Castlemont High is smaller than that campus by headcount and runs leaner classes (16.3:1 vs 18.3:1).
Oakland Unified also operates Oakland Technical High (1,812 students) and Oakland High (1,579 students) alongside Castlemont 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 Castlemont High compares
Castlemont 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 | 16.3:1 | ▼ 24% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 94.1% | ▲ 70% | 55.5% | 51.7% |
| Enrollment | 719 | top 22% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.3:1
Leaner classes than 36% of US schools, a middle-of-the-pack class size.
719
Bigger than 81% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
94.1%
free-lunch eligible
- 70% above the California average of 55.5%
Well above the 40% Title I schoolwide threshold, among the highest-need profiles in the state; federal funds support the whole school, not individual students.
Staffing depth
16.3:1
students per teacher
- 24% below state mean
Top 14% in California - lower ratio than 86% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
81.6%
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
$20,552
per pupil, district-wide
- above California avg of $16,509
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors2.0 FTE
Per 360 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 69 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 9.6 per 100 students. Reported via the Civil Rights Data Collection. Includes 7 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
Hispanic or Latino 60.6%
African American 28.6%
Two or More 3.5%
Native Hawaiian / Pacific Islander 3.2%
White 2.1%
Asian 1.5%
American Indian / Alaska Native 0.6%
Largest group: Hispanic or Latino at 60.6% of enrollment.
Student-body diversity index 54.8/100
Simpson diversity index - at 54.8, Castlemont High is more mixed than the California school average of 46.0.
Programs
AP courses offered 1
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Oakland Unified, which includes Castlemont High.
$20,552
Per student
+24%
vs California
Avg $16,509
+24%
vs U.S.
Avg $16,593
Revenue mix
Local 42.8%
State 42.5%
Federal 14.7%
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 Castlemont High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Oakland Technical High | Larger | Lower economic need | Higher S:T ratio |
| Oakland High | Larger | Lower economic need | Higher S:T ratio |
| Skyline High | Larger | Lower economic need | Lower S:T ratio |
| Fremont High | Larger | Similar economic need | Similar S:T ratio |
| Coliseum College Prep Academy | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Castlemont High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,812
- Students per teacher
- 18.3:1
- Resource Index
- 31/100
- Enrollment
- 1,579
- Students per teacher
- 18.1:1
- Resource Index
- 34/100
- Enrollment
- 1,250
- Students per teacher
- 13.6:1
- Resource Index
- 33/100
- Enrollment
- 1,166
- Students per teacher
- 17.1:1
- Resource Index
- 46/100
- Enrollment
- 861
- Students per teacher
- 17.2:1
- Resource Index
- 25/100
Similar high schools in Oakland
6 comparable high schools (grades 9-12) serving the same city.
Oakland Technical High
Standard public school
1,812 students 18.3:1 students per teacher
Oakland High
Standard public school
1,579 students 18.1:1 students per teacher
Skyline High
Standard public school
1,250 students 13.6:1 students per teacher
Fremont High
Standard public school
1,166 students 17.1:1 students per teacher
Arise High
Standard public school
396 students 15.2:1 students per teacher
Latitude 37.8 High
Standard public school
389 students 20.5:1 students per teacher
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 (~719 students)
Similar student-teacher ratio (~16.3:1)
Next steps
Verify locally before acting on Castlemont High's federal record.
- Compare Castlemont High against another school. Compare schools
- Oakland 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 Castlemont High
How many students attend Castlemont High?
Castlemont High has 719 students enrolled. It is a high school in Oakland, CA.
What is the student-teacher ratio at Castlemont High?
The student-teacher ratio at Castlemont High is 16.3:1, which is 24% lower than the California average of 21.5:1 and 4% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Castlemont High?
94.1% of students at Castlemont High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Castlemont High?
The largest demographic group at Castlemont High is Hispanic or Latino at 60.6% of enrollment, in Oakland, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 54.8/100.
What is the Resource Investment Index for Castlemont High?
Castlemont High has a Resource Investment Index of 28/100 (lower 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 Castlemont High rank among high schools in Oakland?
By Resource Investment Index, Castlemont High ranks #16 of 22 high schools in Oakland, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Oakland on the city page.
Is Castlemont High a good school?
Castlemont High earns 28/100 on the Resource Investment Index, even as it posts class sizes smaller 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 Oakland Unified?
Besides Castlemont High, Oakland Unified also operates Oakland Technical High (1,812 students), Oakland High (1,579 students), and Skyline High (1,250 students). See the Oakland 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.