Enrollment
278
California · 2024-25 NCES data
Elementary school (grades K-5) · Petaluma, CA
Old Adobe Elementary Charter
Federal NCES profile for Old Adobe Elementary Charter, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 33/100.
2024-25 NCES dataElementary school (grades K-5)NCES 062832004386Charter school
👥 S:T ratio 7
🌟 Gifted program 70
🎓 Counselors 0
📋 Attendance 55
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Old Adobe Elementary Charter earns 33/100 on the Resource Investment Index, with class sizes near the California median.
- #15 of 25
- elementary schools in Petaluma · Resource Index
- 33
- Resource Index · Typical
- 23.2:1
- students per teacher
- 20.8%
- free-lunch eligible
Old Adobe Elementary Charter has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Old Adobe Elementary Charter ranks #15 of 25 elementary schools in Petaluma, CA.
School address
District: Old Adobe Union · California
NCES ID 062832004386 Verify on NCES CCD record →
Teachers (FTE)
12.0
Federal CCD staff survey
Students per teacher
23.2:1
vs 21.5:1 California avg
+8% vs state
Free-lunch eligible
20.8%
vs 55.5% California avg
-63% vs state
Student-teacher ratio in context
How Old Adobe Elementary Charter compares with California and U.S. medians
What stands out at Old Adobe Elementary Charter
Old Adobe Elementary Charter is a mid-sized charter elementary school in Petaluma, California, enrolling 278 students.
Class loads run somewhat heavier than typical: 23.2:1 puts it in the larger third of California schools by student-teacher ratio.
Comparatively few students face economic hardship here, 20.8% free-meal eligibility runs 63% below the California average.
Enrollment of 278 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 428 statewide peers matched on enrollment and economic need, it ranks mid-pack at #220.
Its student body is led by White (69%) and Hispanic or Latino (25%) (diversity index 46/100).
Counselor access is stretched at roughly 556 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance runs somewhat below the norm, with 18.0% of students chronically absent per the 2021-22 civil-rights collection.
Among Petaluma's elementary schools, it stands alongside Mary Collins Charter School at Cherry Valley (494 students): Old Adobe Elementary Charter is smaller than that campus by headcount and runs leaner classes (23.2:1 vs 29.1:1).
Old Adobe Union also operates Loma Vista Immersion Academy (451 students) and Sonoma Mountain Elementary (422 students) alongside Old Adobe Elementary Charter.
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 Old Adobe Elementary Charter compares
Old Adobe Elementary Charter on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 23.2:1 | ▲ 8% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 20.8% | ▼ 63% | 55.5% | 51.7% |
| Enrollment | 278 | top 76% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
23.2:1
Leaner classes than 8% of US schools, heavier class loads than most.
278
Bigger than 29% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
20.8%
free-lunch eligible
- 63% below the California average of 55.5%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
23.2:1
students per teacher
- 8% above state mean
Top 64% in California - lower ratio than 36% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
18.0%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$15,370
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
Counselors0.5 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
2
in-school suspensions + 6 out-of-school
Suspension rate: 0.7 per 100 students. Combined in-school and out-of-school rate: 2.9 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
White 69.1%
Hispanic or Latino 24.5%
Two or More 5.8%
African American 0.4%
Asian 0.4%
Largest group: White at 69.1% of enrollment.
Student-body diversity index 45.9/100
Simpson diversity index - at 45.9, Old Adobe Elementary Charter is about as mixed as the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Old Adobe Union, which includes Old Adobe Elementary Charter.
$15,370
Per student
-7%
vs California
Avg $16,509
-7%
vs U.S.
Avg $16,593
Revenue mix
Local 54.9%
State 36.3%
Federal 8.8%
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 Old Adobe Elementary Charter Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Loma Vista Immersion Academy | Larger | Similar economic need | Similar S:T ratio |
| Sonoma Mountain Elementary | Larger | Lower economic need | Higher S:T ratio |
| La Tercera Elementary | Similar size | Higher economic need | Similar S:T ratio |
| Miwok Valley Elementary Charter | Similar size | Higher economic need | Lower S:T ratio |
Comparisons are relative to Old Adobe Elementary Charter's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 451
- Students per teacher
- 22.6:1
- Resource Index
- 24/100
- Enrollment
- 422
- Students per teacher
- 26.4:1
- Resource Index
- 33/100
- Enrollment
- 295
- Students per teacher
- 22.7:1
- Resource Index
- 29/100
- Enrollment
- 288
- Students per teacher
- 19.2:1
- Resource Index
- 36/100
Similar elementary schools in Petaluma
6 comparable elementary schools (grades K-5) serving the same city.
Mary Collins Charter School at Cherry Valley
Standard public school
494 students 29.1:1 students per teacher
Loma Vista Immersion Academy
Standard public school
451 students 22.6:1 students per teacher
Sonoma Mountain Elementary
Standard public school
422 students 26.4:1 students per teacher
Corona Creek Elementary
Standard public school
403 students 22.4:1 students per teacher
Grant Elementary
Standard public school
386 students 24.1:1 students per teacher
Meadow Elementary
Standard public school
384 students 24:1 students per teacher
Similar elementary 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 (~278 students)
Similar student-teacher ratio (~23.2:1)
Next steps
Verify locally before acting on Old Adobe Elementary Charter's federal record.
- Compare Old Adobe Elementary Charter against another school. Compare schools
- Old Adobe Union'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 Old Adobe Elementary Charter
How many students attend Old Adobe Elementary Charter?
Old Adobe Elementary Charter has 278 students enrolled. It is an elementary school in Petaluma, CA.
What is the student-teacher ratio at Old Adobe Elementary Charter?
The student-teacher ratio at Old Adobe Elementary Charter is 23.2:1, which is 8% higher than the California average of 21.5:1 and 48% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Old Adobe Elementary Charter?
20.8% of students at Old Adobe Elementary Charter are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Old Adobe Elementary Charter?
The largest demographic group at Old Adobe Elementary Charter is White at 69.1% of enrollment, in Petaluma, CA.
What is the Resource Investment Index for Old Adobe Elementary Charter?
Old Adobe Elementary Charter has a Resource Investment Index of 33/100 (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 Old Adobe Elementary Charter rank among elementary schools in Petaluma?
By Resource Investment Index, Old Adobe Elementary Charter ranks #15 of 25 elementary 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 elementary schools in Petaluma on the city page.
Is Old Adobe Elementary Charter a good school?
Old Adobe Elementary Charter earns 33/100 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 Old Adobe Union?
Besides Old Adobe Elementary Charter, Old Adobe Union also operates Loma Vista Immersion Academy (451 students), Sonoma Mountain Elementary (422 students), and La Tercera Elementary (295 students). See the Old Adobe Union 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.