Enrollment
538
California · 2024-25 NCES data
Elementary school (grades K-5) · San Diego, CA
Mason Elementary
Federal NCES profile for Mason Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 32/100.
2024-25 NCES dataElementary school (grades K-5)NCES 063432005515
👥 S:T ratio 0
🌟 Gifted program 70
🎓 Counselors 55
📋 Attendance 2
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mason Elementary earns 32/100 on the Resource Investment Index, with class sizes larger than 89% of California schools. It is also more racially and ethnically mixed than most California schools.
- #76 of 179
- elementary schools in San Diego · Resource Index
- 32
- Resource Index · Typical
- 26.9:1
- large classes for California
- 37.5%
- free-lunch eligible
Mason Elementary has class sizes larger than 89% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Mason Elementary ranks #76 of 179 elementary schools in San Diego, CA.
School address
District: San Diego Unified · California
NCES ID 063432005515 Verify on NCES CCD record →
Teachers (FTE)
20.0
Federal CCD staff survey
Students per teacher
26.9:1
vs 21.5:1 California avg
+25% vs state
Free-lunch eligible
37.5%
vs 55.5% California avg
-32% vs state
Student-teacher ratio in context
How Mason Elementary compares with California and U.S. medians
What stands out at Mason Elementary
Mason Elementary is a mid-sized elementary school in San Diego, California, enrolling 538 students.
Class loads run heavy: 26.9:1 is larger than about 89% of California schools and 25% above the 21.5:1 state mean, so each teacher carries more students than is typical.
Economic need runs somewhat below the state's typical profile, with 37.5% of students eligible for free meals.
With 538 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 1,379 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #548.
Its student body is led by Hispanic or Latino (43%) and Asian (22%), more mixed than most schools in the state (diversity index 72/100).
Counselor coverage is strong, about 224 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 39.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among San Diego's elementary schools, it stands alongside Albert Einstein Academies (1,448 students): Mason Elementary is smaller than that campus by headcount and runs heavier classes (26.9:1 vs 24.1:1).
San Diego Unified also operates Henry High (2,485 students) and Mira Mesa High (2,187 students) alongside Mason 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 Mason Elementary compares
Mason 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 | 26.9:1 | ▲ 25% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 37.5% | ▼ 32% | 55.5% | 51.7% |
| Enrollment | 538 | top 40% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
26.9:1
Leaner classes than 3% of US schools, heavier class loads than most.
538
Bigger than 66% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
37.5%
free-lunch eligible
- 32% 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
26.9:1
students per teacher
- 25% above state mean
Top 89% in California - lower ratio than 11% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
39.4%
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
$18,665
per pupil, district-wide
- above California avg of $16,509
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors2.4 FTE
Per 224 students, the combined health-and-guidance staffing load for this school.
Discipline context
4
in-school suspensions + 1 out-of-school
Suspension rate: 0.7 per 100 students. Combined in-school and out-of-school rate: 0.9 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
Hispanic or Latino 42.6%
Asian 22.1%
White 15.6%
Two or More 13.2%
African American 6.1%
Native Hawaiian / Pacific Islander 0.4%
Largest group: Hispanic or Latino at 42.6% of enrollment.
Student-body diversity index 72.4/100
Simpson diversity index - at 72.4, Mason Elementary is more mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for San Diego Unified, which includes Mason Elementary.
$18,665
Per student
+13%
vs California
Avg $16,509
+12%
vs U.S.
Avg $16,593
Revenue mix
Local 60.5%
State 25.1%
Federal 14.4%
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 Mason Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Henry High | Larger | Similar economic need | Similar S:T ratio |
| Mira Mesa High | Larger | Similar economic need | Lower S:T ratio |
| Hoover High | Larger | Higher economic need | Lower S:T ratio |
| Scripps Ranch High | Larger | Lower economic need | Similar S:T ratio |
| Point Loma High | Larger | Similar economic need | Similar S:T ratio |
Comparisons are relative to Mason Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,485
- Students per teacher
- 25.9:1
- Resource Index
- 21/100
- Enrollment
- 2,187
- Students per teacher
- 24.9:1
- Resource Index
- 38/100
- Enrollment
- 2,011
- Students per teacher
- 20.5:1
- Resource Index
- 12/100
- Enrollment
- 1,890
- Students per teacher
- 27:1
- Resource Index
- 45/100
- Enrollment
- 1,724
- Students per teacher
- 26.1:1
- Resource Index
- 24/100
Similar elementary schools in San Diego
6 comparable elementary schools (grades K-5) serving the same city.
Albert Einstein Academies
Standard public school
1,448 students 24.1:1 students per teacher
Design 39 Campus
Standard public school
1,216 students 27:1 students per teacher
Nestor Language Academy Charter
Standard public school
1,079 students 25.7:1 students per teacher
Ocean View Hills
Standard public school
1,020 students 23.7:1 students per teacher
Language Academy
Standard public school
1,015 students 22.6:1 students per teacher
Del Sur Elementary
Standard public school
891 students 24.1:1 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 (~538 students)
Similar student-teacher ratio (~26.9:1)
Next steps
Verify locally before acting on Mason Elementary's federal record.
- Compare Mason Elementary against another school. Compare schools
- San Diego 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 Mason Elementary
How many students attend Mason Elementary?
Mason Elementary has 538 students enrolled. It is an elementary school in San Diego, CA.
What is the student-teacher ratio at Mason Elementary?
The student-teacher ratio at Mason Elementary is 26.9:1, which is 25% higher than the California average of 21.5:1 and 71% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Mason Elementary?
37.5% of students at Mason Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Mason Elementary?
The largest demographic group at Mason Elementary is Hispanic or Latino at 42.6% of enrollment, in San Diego, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 72.4/100.
What is the Resource Investment Index for Mason Elementary?
Mason Elementary has a Resource Investment Index of 32/100 (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 Mason Elementary rank among elementary schools in San Diego?
By Resource Investment Index, Mason Elementary ranks #76 of 179 elementary schools in San Diego, 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 San Diego on the city page.
Is Mason Elementary a good school?
Mason Elementary earns 32/100 on the Resource Investment Index, with class sizes larger than 89% of California schools. It is also more racially and ethnically mixed than most 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 San Diego Unified?
Besides Mason Elementary, San Diego Unified also operates Henry High (2,485 students), Mira Mesa High (2,187 students), and Hoover High (2,011 students). See the San Diego 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.