Enrollment
1,653
California · 2024-25 NCES data
High school (grades 9-12) · Petaluma, CA
Casa Grande High
Federal NCES profile for Casa Grande High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 39/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063025004715
👥 S:T ratio 13
📚 AP courses 70
🌟 Gifted program 30
🎓 Counselors 34
📋 Attendance 50
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Casa Grande High earns 39/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #4 of 5
- high schools in Petaluma · Resource Index
- 39
- Resource Index · Typical
- 21.8:1
- students per teacher
- 33.1%
- free-lunch eligible
Casa Grande High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Casa Grande High ranks #4 of 5 high schools in Petaluma, CA.
School address
District: Petaluma Joint Union High · California
NCES ID 063025004715 Verify on NCES CCD record →
Teachers (FTE)
76.0
Federal CCD staff survey
Students per teacher
21.8:1
vs 21.5:1 California avg
+1% vs state
Free-lunch eligible
33.1%
vs 55.5% California avg
-40% vs state
Student-teacher ratio in context
How Casa Grande High compares with California and U.S. medians
What stands out at Casa Grande High
Casa Grande High is a large high school in Petaluma, California, enrolling 1,653 students.
At 21.8:1, 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 33.1% of students eligible for free meals.
By headcount it is one of the larger campuses in California, bigger than 95% of state schools at 1,653 students.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 350 statewide peers matched on enrollment and economic need, it ranks mid-pack at #183.
Its student body is led by Hispanic or Latino (47%) and White (42%) (diversity index 60/100).
On the academic-pipeline side it reports 14 Advanced Placement courses.
Counselor availability sits well past the ASCA benchmark, roughly 331 students sharing each counselor, though short of the most stretched campuses.
Attendance runs somewhat below the norm, with 20.1% of students chronically absent per the 2021-22 civil-rights collection.
The federal civil-rights collection also records 3 expulsions at this campus for 2021-22.
Among Petaluma's high schools, it stands alongside Petaluma High (1,193 students): Casa Grande High is larger than that campus by headcount and runs heavier classes (21.8:1 vs 20.9:1).
Petaluma Joint Union High also operates Petaluma High (1,193 students) and Kenilworth Junior High (812 students) alongside Casa Grande 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 Casa Grande High compares
Casa Grande 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 | 21.8:1 | ▲ 1% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 33.1% | ▼ 40% | 55.5% | 51.7% |
| Enrollment | 1,653 | top 5% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.8:1
Leaner classes than 11% of US schools, heavier class loads than most.
1,653
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
33.1%
free-lunch eligible
- 40% 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
21.8:1
students per teacher
- 1% above state mean
Top 51% in California - lower ratio than 49% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
20.1%
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.
Support staff
Counselors5.0 FTE
Per 331 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 44 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 2.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 3 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 46.8%
White 41.8%
Two or More 5.5%
Asian 3.6%
African American 1.6%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.3%
Largest group: Hispanic or Latino at 46.8% of enrollment.
Student-body diversity index 60.2/100
Simpson diversity index - at 60.2, Casa Grande High is more mixed than the California school average of 46.0.
Programs
AP courses offered 14
How Casa Grande High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Petaluma High | Smaller | Similar economic need | Similar S:T ratio |
| Kenilworth Junior High | Smaller | Similar economic need | Similar S:T ratio |
| Mary Collins Charter School at Cherry Valley | Smaller | Lower economic need | Higher S:T ratio |
| Petaluma Junior High | Smaller | Similar economic need | Similar S:T ratio |
| Petaluma Accelerated Charter | Smaller | Lower economic need | Higher S:T ratio |
Comparisons are relative to Casa Grande High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,193
- Students per teacher
- 20.9:1
- Resource Index
- 44/100
- Enrollment
- 812
- Students per teacher
- 21.4:1
- Resource Index
- 50/100
- Enrollment
- 494
- Students per teacher
- 29.1:1
- Resource Index
- 37/100
- Enrollment
- 454
- Students per teacher
- 20.6:1
- Resource Index
- 42/100
- Enrollment
- 115
- Students per teacher
- 28.8:1
- Resource Index
- 51/100
Similar high schools in Petaluma
4 comparable high schools (grades 9-12) serving the same city.
Petaluma High
Standard public school
1,193 students 20.9:1 students per teacher
San Antonio High (Continuation)
Alternative education program
65 students 10.8:1 students per teacher
Sonoma Mountain High (Continuation)
Alternative education program
21 students 21:1 students per teacher
Carpe Diem High (Continuation)
Alternative education program
19 students 9.5:1 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 (~1,653 students)
Similar student-teacher ratio (~21.8:1)
Next steps
Verify locally before acting on Casa Grande High's federal record.
- Compare Casa Grande High against another school. Compare schools
- Petaluma Joint 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 Casa Grande High
How many students attend Casa Grande High?
Casa Grande High has 1,653 students enrolled. It is a high school in Petaluma, CA.
What is the student-teacher ratio at Casa Grande High?
The student-teacher ratio at Casa Grande High is 21.8:1, which is 1% higher than the California average of 21.5:1 and 39% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Casa Grande High?
33.1% of students at Casa Grande High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Casa Grande High?
The largest demographic group at Casa Grande High is Hispanic or Latino at 46.8% of enrollment, in Petaluma, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 60.2/100.
What is the Resource Investment Index for Casa Grande High?
Casa Grande High has a Resource Investment Index of 39/100 (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 Casa Grande High rank among high schools in Petaluma?
By Resource Investment Index, Casa Grande High ranks #4 of 5 high schools in Petaluma, 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 Petaluma on the city page.
Is Casa Grande High a good school?
Casa Grande High earns 39/100 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 Petaluma Joint Union High?
Besides Casa Grande High, Petaluma Joint Union High also operates Petaluma High (1,193 students), Kenilworth Junior High (812 students), and Mary Collins Charter School at Cherry Valley (494 students). See the Petaluma Joint 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.