Enrollment
535
California · 2024-25 NCES data
Elementary school (grades K-5) · Santa Rosa, CA
Mattie Washburn Elementary
Federal NCES profile for Mattie Washburn Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataElementary school (grades K-5)NCES 060003401797
👥 S:T ratio 21
🌟 Gifted program 30
📋 Attendance 35
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mattie Washburn Elementary earns 28/100 on the Resource Investment Index, with class sizes near the California median.
- #24 of 45
- elementary schools in Santa Rosa · Resource Index
- 28
- Resource Index · Lower
- 19.8:1
- students per teacher
- 39.5%
- free-lunch eligible
Mattie Washburn Elementary has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Mattie Washburn Elementary ranks #24 of 45 elementary schools in Santa Rosa, CA.
School address
District: Windsor Unified · California
NCES ID 060003401797 Verify on NCES CCD record →
Teachers (FTE)
27.0
Federal CCD staff survey
Students per teacher
19.8:1
vs 21.5:1 California avg
-8% vs state
Free-lunch eligible
39.5%
vs 55.5% California avg
-29% vs state
Student-teacher ratio in context
How Mattie Washburn Elementary compares with California and U.S. medians
What stands out at Mattie Washburn Elementary
Mattie Washburn Elementary is a mid-sized elementary school in Santa Rosa, California, enrolling 535 students.
Class sizes run a bit leaner than typical: 19.8:1 puts it in the smaller third of California schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 39.5% of students eligible for free meals.
With 535 students, its enrollment sits close to the California median campus size.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 1,395 statewide peers matched on enrollment and economic need, it ranks mid-pack at #723.
Its student body is led by Hispanic or Latino (50%) and White (38%) (diversity index 60/100).
Chronic absenteeism is elevated: 26.2% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Santa Rosa's elementary schools, it stands alongside Cesar Chavez Language Academy (773 students): Mattie Washburn Elementary is smaller than that campus by headcount and runs heavier classes (19.8:1 vs 18.9:1).
Windsor Unified also operates Windsor High (1,700 students) and Cali Calmecac Language Academy (1,075 students) alongside Mattie Washburn Elementary.
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 Mattie Washburn Elementary compares
Mattie Washburn Elementary on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 19.8:1 | ▼ 8% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 39.5% | ▼ 29% | 55.5% | 51.7% |
| Enrollment | 535 | top 40% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
19.8:1
Leaner classes than 17% of US schools, heavier class loads than most.
535
Bigger than 66% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
39.5%
free-lunch eligible
- 29% 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
19.8:1
students per teacher
- 8% below state mean
Top 33% in California - lower ratio than 67% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
26.2%
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
$14,106
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
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 1 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.2 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
Hispanic or Latino 50.1%
White 37.6%
Two or More 7.9%
Asian 2.1%
American Indian / Alaska Native 1.1%
Native Hawaiian / Pacific Islander 0.9%
African American 0.4%
Largest group: Hispanic or Latino at 50.1% of enrollment.
Student-body diversity index 60.1/100
Simpson diversity index - at 60.1, Mattie Washburn Elementary is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Windsor Unified, which includes Mattie Washburn Elementary.
$14,106
Per student
-15%
vs California
Avg $16,509
-15%
vs U.S.
Avg $16,593
Revenue mix
Local 63.5%
State 29.8%
Federal 6.7%
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 Mattie Washburn Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Windsor High | Larger | Similar economic need | Similar S:T ratio |
| Cali Calmecac Language Academy | Larger | Similar economic need | Similar S:T ratio |
| Windsor Middle | Larger | Similar economic need | Similar S:T ratio |
| Brooks Elementary | Similar size | Similar economic need | Higher S:T ratio |
| Bridges Community Based School North County Consortium | Smaller | Similar economic need | Lower S:T ratio |
Comparisons are relative to Mattie Washburn Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,700
- Students per teacher
- 21:1
- Resource Index
- 38/100
- Enrollment
- 1,075
- Students per teacher
- 20.7:1
- Resource Index
- 22/100
- Enrollment
- 736
- Students per teacher
- 19.9:1
- Resource Index
- 44/100
- Enrollment
- 493
- Students per teacher
- 24.6:1
- Resource Index
- 26/100
- Enrollment
- 52
- Students per teacher
- 8.7:1
- Resource Index
- 48/100
Similar elementary schools in Santa Rosa
6 comparable elementary schools (grades K-5) serving the same city.
Cesar Chavez Language Academy
Standard public school
773 students 18.9:1 students per teacher
Oak Grove Elementary/Willowside Middle
Standard public school
708 students 21.5:1 students per teacher
Sheppard Elementary
Standard public school
577 students 24:1 students per teacher
Roseland Creek Elementary
Standard public school
534 students 24.3:1 students per teacher
Santa Rosa French-American Charter (Srfacs)
Standard public school
525 students 23.9:1 students per teacher
Yulupa Elementary
Standard public school
523 students 19.4:1 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 (~535 students)
Next steps
Verify locally before acting on Mattie Washburn Elementary's federal record.
- Compare Mattie Washburn Elementary against another school. Compare schools
- Windsor 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 Mattie Washburn Elementary
How many students attend Mattie Washburn Elementary?
Mattie Washburn Elementary has 535 students enrolled. It is an elementary school in Santa Rosa, CA.
What is the student-teacher ratio at Mattie Washburn Elementary?
The student-teacher ratio at Mattie Washburn Elementary is 19.8:1, which is 8% lower than the California average of 21.5:1 and 26% 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 Mattie Washburn Elementary?
39.5% of students at Mattie Washburn Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Mattie Washburn Elementary?
The largest demographic group at Mattie Washburn Elementary is Hispanic or Latino at 50.1% of enrollment, in Santa Rosa, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 60.1/100.
What is the Resource Investment Index for Mattie Washburn Elementary?
Mattie Washburn Elementary has a Resource Investment Index of 28/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mattie Washburn Elementary rank among elementary schools in Santa Rosa?
By Resource Investment Index, Mattie Washburn Elementary ranks #24 of 45 elementary schools in Santa Rosa, 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 Santa Rosa on the city page.
Is Mattie Washburn Elementary a good school?
Mattie Washburn Elementary earns 28/100 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 Windsor Unified?
Besides Mattie Washburn Elementary, Windsor Unified also operates Windsor High (1,700 students), Cali Calmecac Language Academy (1,075 students), and Windsor Middle (736 students). See the Windsor 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.