Enrollment
324
California · 2024-25 NCES data
Middle school (grades 6-8) · Sonoma, CA
Altimira Middle
Federal NCES profile for Altimira Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 45/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 063720006298
👥 S:T ratio 38
🌟 Gifted program 70
🎓 Counselors 71
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Altimira Middle earns 45/100 on the Resource Investment Index, with class sizes smaller than 88% of California schools.
- #2 of 10
- public schools in Sonoma · Resource Index
- 45
- Resource Index · Typical
- 15.4:1
- small classes for California
- 50.8%
- free-lunch eligible
Altimira Middle has class sizes smaller than 88% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Altimira Middle ranks #2 of 10 public schools in Sonoma, CA.
School address
District: Sonoma Valley Unified · California
NCES ID 063720006298 Verify on NCES CCD record →
Teachers (FTE)
21.0
Federal CCD staff survey
Students per teacher
15.4:1
vs 21.5:1 California avg
-28% vs state
Free-lunch eligible
50.8%
vs 55.5% California avg
-8% vs state
Student-teacher ratio in context
How Altimira Middle compares with California and U.S. medians
What stands out at Altimira Middle
Altimira Middle is a higher-need, mid-sized middle school in Sonoma, California, enrolling 324 students.
Classes run notably small here: at 15.4:1, Altimira Middle is leaner than roughly 88% of California schools and 28% under the state's 21.5:1 norm, more adult attention per pupil than most peers.
Its free-meal eligibility rate of 50.8% lands close to the California typical range, neither a high- nor low-need campus by this measure.
Enrollment of 324 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Among 1,021 similarly sized, similarly resourced-need California schools statewide, it ranks #75, a top-tier result once campus size and economic need are matched.
Its student body is predominantly Hispanic or Latino (83% of enrollment) (diversity index 28/100).
Counselor coverage is strong, about 147 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 50.0% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Sonoma Valley Unified spends $21,339 per pupil, 29% above the California average, a better-resourced district than most.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Among Sonoma's middle schools, it stands alongside Adele Harrison Middle (334 students): Altimira Middle is smaller than that campus by headcount and runs leaner classes (15.4:1 vs 19.6:1).
Sonoma Valley Unified also operates Sonoma Valley High (1,071 students) and Flowery Elementary (368 students) alongside Altimira 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 Altimira Middle compares
Altimira 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 | 15.4:1 | ▼ 28% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 50.8% | ▼ 8% | 55.5% | 51.7% |
| Enrollment | 324 | top 71% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
15.4:1
Leaner classes than 43% of US schools, a middle-of-the-pack class size.
324
Bigger than 36% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
50.8%
free-lunch eligible
- 8% below the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
15.4:1
students per teacher
- 28% below state mean
Top 12% in California - lower ratio than 88% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
50.0%
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
$21,339
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
Counselors2.2 FTE
Per 147 students, the combined health-and-guidance staffing load for this school.
Discipline context
26
in-school suspensions + 13 out-of-school
Suspension rate: 8.0 per 100 students. Combined in-school and out-of-school rate: 12.0 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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 83.3%
White 14.8%
Two or More 1.2%
Asian 0.3%
American Indian / Alaska Native 0.3%
Largest group: Hispanic or Latino at 83.3% of enrollment.
Student-body diversity index 28.4/100
Simpson diversity index - at 28.4, Altimira Middle is less mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Sonoma Valley Unified, which includes Altimira Middle.
$21,339
Per student
+29%
vs California
Avg $16,509
+29%
vs U.S.
Avg $16,593
Revenue mix
Local 74.2%
State 14.7%
Federal 11.2%
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 Altimira Middle Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sonoma Valley High | Larger | Lower economic need | Higher S:T ratio |
| Flowery Elementary | Similar size | Similar economic need | Higher S:T ratio |
| Adele Harrison Middle | Similar size | Lower economic need | Higher S:T ratio |
| El Verano Elementary | Similar size | Similar economic need | Higher S:T ratio |
| Sassarini Elementary | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Altimira Middle's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,071
- Students per teacher
- 20.6:1
- Resource Index
- 36/100
- Enrollment
- 368
- Students per teacher
- 24.5:1
- Resource Index
- 11/100
- Enrollment
- 334
- Students per teacher
- 19.6:1
- Resource Index
- 30/100
- Enrollment
- 314
- Students per teacher
- 26.2:1
- Resource Index
- 7/100
- Enrollment
- 281
- Students per teacher
- 21.6:1
- Resource Index
- 19/100
Similar middle schools in Sonoma
1 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 (~324 students)
Similar student-teacher ratio (~15.4:1)
Next steps
Verify locally before acting on Altimira Middle's federal record.
- Compare Altimira Middle against another school. Compare schools
- Sonoma Valley 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 Altimira Middle
How many students attend Altimira Middle?
Altimira Middle has 324 students enrolled. It is a middle school in Sonoma, CA.
What is the student-teacher ratio at Altimira Middle?
The student-teacher ratio at Altimira Middle is 15.4:1, which is 28% lower than the California average of 21.5:1 and 2% lower 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 Altimira Middle?
50.8% of students at Altimira Middle are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Altimira Middle?
The largest demographic group at Altimira Middle is Hispanic or Latino at 83.3% of enrollment, in Sonoma, CA.
What is the Resource Investment Index for Altimira Middle?
Altimira Middle has a Resource Investment Index of 45/100 (typical 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 Altimira Middle rank among public schools in Sonoma?
By Resource Investment Index, Altimira Middle ranks #2 of 10 public schools in Sonoma, 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 Sonoma on the city page.
Is Altimira Middle a good school?
Altimira Middle earns 45/100 on the Resource Investment Index, with class sizes smaller than 88% 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 Sonoma Valley Unified?
Besides Altimira Middle, Sonoma Valley Unified also operates Sonoma Valley High (1,071 students), Flowery Elementary (368 students), and Adele Harrison Middle (334 students). See the Sonoma Valley 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.