Enrollment
455
California · 2024-25 NCES data
Elementary school (grades K-5) · Oxnard, CA
Rio Plaza Elementary
Federal NCES profile for Rio Plaza Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 22/100.
2024-25 NCES dataElementary school (grades K-5)NCES 063276005091
👥 S:T ratio 4
🌟 Gifted program 70
🎓 Counselors 9
📋 Attendance 4
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Rio Plaza Elementary earns 22/100 on the Resource Investment Index, with class sizes larger than 70% of California schools. It is also less racially and ethnically mixed than most California schools.
- #27 of 32
- elementary schools in Oxnard · Resource Index
- 22
- Resource Index · Lower
- 23.9:1
- large classes for California
- 78.0%
- free-lunch eligible
Rio Plaza Elementary has class sizes larger than 70% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Rio Plaza Elementary ranks #27 of 32 elementary schools in Oxnard, CA.
School address
District: Rio Elementary · California
NCES ID 063276005091 Verify on NCES CCD record →
Teachers (FTE)
19.0
Federal CCD staff survey
Students per teacher
23.9:1
vs 21.5:1 California avg
+11% vs state
Free-lunch eligible
78.0%
vs 55.5% California avg
+41% vs state
Student-teacher ratio in context
How Rio Plaza Elementary compares with California and U.S. medians
What stands out at Rio Plaza Elementary
Rio Plaza Elementary is a high-poverty, mid-sized elementary school in Oxnard, California, enrolling 455 students.
Class loads run somewhat heavier than typical: 23.9:1 puts it in the larger third of California schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 78.0% of students eligible for free meals.
With 455 students, its enrollment sits close to the California median campus size.
Its Resource Investment Index lands in the lower third of 9,998 scored California schools.
Against 2,093 statewide peers matched on enrollment and economic need, it ranks mid-pack at #1,306.
Its student body is predominantly Hispanic or Latino (97% of enrollment), among the less diverse in the state (diversity index 6/100).
Counselor access is stretched at roughly 455 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 38.2% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Oxnard's elementary schools, it stands alongside Juan Lagunas Soria Elementary (895 students): Rio Plaza Elementary is smaller than that campus by headcount and runs heavier classes (23.9:1 vs 22.9:1).
Rio Elementary also operates Rio Del Sol (839 students) and Rio Real Elementary (794 students) alongside Rio Plaza 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 Rio Plaza Elementary compares
Rio Plaza 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 | 23.9:1 | ▲ 11% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 78.0% | ▲ 41% | 55.5% | 51.7% |
| Enrollment | 455 | top 52% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
23.9:1
Leaner classes than 7% of US schools, heavier class loads than most.
455
Bigger than 56% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
78.0%
free-lunch eligible
- 41% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
23.9:1
students per teacher
- 11% above state mean
Top 70% in California - lower ratio than 30% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
38.2%
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
$15,938
per pupil, district-wide
- below California avg of $16,509
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors1.0 FTE
Per 455 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 3 out-of-school
Suspension rate: 0.2 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 96.9%
White 2.2%
Asian 0.7%
Native Hawaiian / Pacific Islander 0.2%
Largest group: Hispanic or Latino at 96.9% of enrollment.
Student-body diversity index 6.1/100
Simpson diversity index - at 6.1, Rio Plaza Elementary is less mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Rio Elementary, which includes Rio Plaza Elementary.
$15,938
Per student
-3%
vs California
Avg $16,509
-4%
vs U.S.
Avg $16,593
Revenue mix
Local 32.2%
State 57.4%
Federal 10.3%
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 Rio Plaza Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Rio Del Sol | Larger | Lower economic need | Higher S:T ratio |
| Rio Real Elementary | Larger | Lower economic need | Similar S:T ratio |
| Rio Vista Middle | Larger | Lower economic need | Lower S:T ratio |
| Rio Del Valle Middle | Larger | Lower economic need | Lower S:T ratio |
| Rio Rosales | Similar size | Lower economic need | Similar S:T ratio |
Comparisons are relative to Rio Plaza Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 839
- Students per teacher
- 25.4:1
- Resource Index
- 30/100
- Enrollment
- 794
- Students per teacher
- 24.8:1
- Resource Index
- 30/100
- Enrollment
- 637
- Students per teacher
- 19.9:1
- Resource Index
- 29/100
- Enrollment
- 569
- Students per teacher
- 17.2:1
- Resource Index
- 35/100
- Enrollment
- 557
- Students per teacher
- 24.2:1
- Resource Index
- 11/100
Similar elementary schools in Oxnard
6 comparable elementary schools (grades K-5) serving the same city.
Juan Lagunas Soria Elementary
Standard public school
895 students 22.9:1 students per teacher
Driffill Elementary
Standard public school
891 students 17.5:1 students per teacher
Kamala Elementary
Standard public school
842 students 20.5:1 students per teacher
Rio Del Sol
Standard public school
839 students 25.4:1 students per teacher
Curren Elementary
Standard public school
817 students 18.2:1 students per teacher
Lemonwood Elementary
Standard public school
808 students 18.4:1 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 (~455 students)
Similar student-teacher ratio (~23.9:1)
Next steps
Verify locally before acting on Rio Plaza Elementary's federal record.
- Compare Rio Plaza Elementary against another school. Compare schools
- Rio Elementary'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 Rio Plaza Elementary
How many students attend Rio Plaza Elementary?
Rio Plaza Elementary has 455 students enrolled. It is an elementary school in Oxnard, CA.
What is the student-teacher ratio at Rio Plaza Elementary?
The student-teacher ratio at Rio Plaza Elementary is 23.9:1, which is 11% higher than the California average of 21.5:1 and 52% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Rio Plaza Elementary?
78.0% of students at Rio Plaza Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Rio Plaza Elementary?
The largest demographic group at Rio Plaza Elementary is Hispanic or Latino at 96.9% of enrollment, in Oxnard, CA.
What is the Resource Investment Index for Rio Plaza Elementary?
Rio Plaza Elementary has a Resource Investment Index of 22/100 (lower 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 Rio Plaza Elementary rank among elementary schools in Oxnard?
By Resource Investment Index, Rio Plaza Elementary ranks #27 of 32 elementary schools in Oxnard, 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 Oxnard on the city page.
Is Rio Plaza Elementary a good school?
Rio Plaza Elementary earns 22/100 on the Resource Investment Index, with class sizes larger than 70% of California schools. It is also less 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 Rio Elementary?
Besides Rio Plaza Elementary, Rio Elementary also operates Rio Del Sol (839 students), Rio Real Elementary (794 students), and Rio Vista Middle (637 students). See the Rio Elementary 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.