Enrollment
2,109
California · 2024-25 NCES data
High school (grades 9-12) · Elk Grove, CA
Cosumnes Oaks High
Federal NCES profile for Cosumnes Oaks High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 50/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 061233012274
👥 S:T ratio 13
📚 AP courses 100
🌟 Gifted program 70
🎓 Counselors 25
📋 Attendance 42
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Cosumnes Oaks High earns 50/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #4 of 6
- high schools in Elk Grove · Resource Index
- 50
- Resource Index · Higher
- 21.7:1
- students per teacher
- 26.6%
- free-lunch eligible
Cosumnes Oaks High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Cosumnes Oaks High ranks #4 of 6 high schools in Elk Grove, CA.
School address
District: Elk Grove Unified · California
NCES ID 061233012274 Verify on NCES CCD record →
Teachers (FTE)
97.0
Federal CCD staff survey
Students per teacher
21.7:1
vs 21.5:1 California avg
+1% vs state
Free-lunch eligible
26.6%
vs 55.5% California avg
-52% vs state
Student-teacher ratio in context
How Cosumnes Oaks High compares with California and U.S. medians
What stands out at Cosumnes Oaks High
Cosumnes Oaks High is a large high school in Elk Grove, California, enrolling 2,109 students.
At 21.7:1, 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 26.6% of students eligible for free meals.
By headcount it is one of the larger campuses in California, bigger than 97% of state schools at 2,109 students.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Against 267 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #64.
Its student body is led by Asian (43%) and Hispanic or Latino (20%), more mixed than most schools in the state (diversity index 73/100).
On the academic-pipeline side it reports 20 Advanced Placement courses.
Counselor availability sits well past the ASCA benchmark, roughly 373 students sharing each counselor, though short of the most stretched campuses.
Attendance runs somewhat below the norm, with 23.1% of students chronically absent per the 2021-22 civil-rights collection.
Among Elk Grove's high schools, it stands alongside Franklin High (2,650 students): Cosumnes Oaks High is smaller than that campus by headcount and runs leaner classes (21.7:1 vs 23.2:1).
Elk Grove Unified also operates Franklin High (2,650 students) and Pleasant Grove High (2,536 students) alongside Cosumnes Oaks 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 Cosumnes Oaks High compares
Cosumnes Oaks 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 | 21.7:1 | ▲ 1% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 26.6% | ▼ 52% | 55.5% | 51.7% |
| Enrollment | 2,109 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.7:1
Leaner classes than 11% of US schools, heavier class loads than most.
2,109
Bigger than 98% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
26.6%
free-lunch eligible
- 52% 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
21.7:1
students per teacher
- 1% above state mean
Top 50% in California - lower ratio than 50% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
23.1%
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
$14,134
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
Counselors5.7 FTE
Per 373 students, the combined health-and-guidance staffing load for this school.
Discipline context
11
in-school suspensions + 85 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 4.6 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
Asian 43.1%
Hispanic or Latino 19.9%
White 13.7%
African American 11.7%
Two or More 10.6%
Native Hawaiian / Pacific Islander 0.7%
American Indian / Alaska Native 0.3%
Largest group: Asian at 43.1% of enrollment.
Student-body diversity index 73.1/100
Simpson diversity index - at 73.1, Cosumnes Oaks High is more mixed than the California school average of 46.0.
Programs
AP courses offered 20
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Elk Grove Unified, which includes Cosumnes Oaks High.
$14,134
Per student
-14%
vs California
Avg $16,509
-15%
vs U.S.
Avg $16,593
Revenue mix
Local 22.1%
State 65.7%
Federal 12.2%
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 Cosumnes Oaks High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Franklin High | Larger | Similar economic need | Higher S:T ratio |
| Pleasant Grove High | Similar size | Similar economic need | Similar S:T ratio |
| Sheldon High | Similar size | Higher economic need | Similar S:T ratio |
| Monterey Trail High | Similar size | Higher economic need | Similar S:T ratio |
| Laguna Creek High | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Cosumnes Oaks High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,650
- Students per teacher
- 23.2:1
- Resource Index
- 43/100
- Enrollment
- 2,536
- Students per teacher
- 22.6:1
- Resource Index
- 40/100
- Enrollment
- 2,368
- Students per teacher
- 21.7:1
- Resource Index
- 39/100
- Enrollment
- 2,263
- Students per teacher
- 21.1:1
- Resource Index
- 39/100
- Enrollment
- 2,142
- Students per teacher
- 21:1
- Resource Index
- 32/100
Similar high schools in Elk Grove
5 comparable high schools (grades 9-12) serving the same city.
Franklin High
Standard public school
2,650 students 23.2:1 students per teacher
Pleasant Grove High
Standard public school
2,536 students 22.6:1 students per teacher
Monterey Trail High
Standard public school
2,263 students 21.1:1 students per teacher
Laguna Creek High
Standard public school
2,142 students 21:1 students per teacher
Elk Grove High
Standard public school
1,684 students 19.1:1 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 (~2,109 students)
Similar student-teacher ratio (~21.7:1)
Next steps
Verify locally before acting on Cosumnes Oaks High's federal record.
- Compare Cosumnes Oaks High against another school. Compare schools
- Elk Grove 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 Cosumnes Oaks High
How many students attend Cosumnes Oaks High?
Cosumnes Oaks High has 2,109 students enrolled. It is a high school in Elk Grove, CA.
What is the student-teacher ratio at Cosumnes Oaks High?
The student-teacher ratio at Cosumnes Oaks High is 21.7:1, which is 1% higher than the California average of 21.5:1 and 38% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Cosumnes Oaks High?
26.6% of students at Cosumnes Oaks High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Cosumnes Oaks High?
The largest demographic group at Cosumnes Oaks High is Asian at 43.1% of enrollment, in Elk Grove, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 73.1/100.
What is the Resource Investment Index for Cosumnes Oaks High?
Cosumnes Oaks High has a Resource Investment Index of 50/100 (higher 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 Cosumnes Oaks High rank among high schools in Elk Grove?
By Resource Investment Index, Cosumnes Oaks High ranks #4 of 6 high schools in Elk Grove, 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 Elk Grove on the city page.
Is Cosumnes Oaks High a good school?
Cosumnes Oaks High earns 50/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California. 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 Elk Grove Unified?
Besides Cosumnes Oaks High, Elk Grove Unified also operates Franklin High (2,650 students), Pleasant Grove High (2,536 students), and Sheldon High (2,368 students). See the Elk Grove 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.