- Enrollment
- 839
- Students per teacher
- 25.4:1
- Resource Index
- 30/100
Elementary school (grades K-5) · Oxnard, CA
Rio Del Mar
Federal NCES profile for Rio Del Mar, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 30/100.
2024-25 NCES dataElementary school (grades K-5)NCES 063276011833
👥 S:T ratio 0
🌟 Gifted program 70
🎓 Counselors 0
📋 Attendance 48
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Rio Del Mar earns 30/100 on the Resource Investment Index, with class sizes larger than 97% of California schools.
- #7 of 32
- elementary schools in Oxnard · Resource Index
- 30
- Resource Index · Lower
- 31.2:1
- large classes for California
- 45.2%
- free-lunch eligible
Rio Del Mar has class sizes larger than 97% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Rio Del Mar ranks #7 of 32 elementary schools in Oxnard, CA.
School address
District: Rio Elementary · California
NCES ID 063276011833 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+34 students YoY
Rio Del Mar grew from 416 students in 2022-23 to 450 in 2023-24 (+8.2%).
Teacher FTE added 16.0 → 17.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+34 students YoY 063276011833 · Oxnard, CA Elementary · SMALL · TRAD
499 enr · 31.2:1 · 45.2% lunch · RII 30
Nearest enrollment peer: Rio Del Sol (839 students)
Rio Del Mar grew from 416 students in 2022-23 to 450 in 2023-24 (+8.2%). Teacher FTE added 16.0 → 17.0 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Rio Del Mar in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Rio Del Sol
Rio Del Sol
839 students
- Rio Real Eleme
Rio Real Elementary
794 students
- Rio Vista Midd
Rio Vista Middle
637 students
- Rio Del Valle
Rio Del Valle Middle
569 students
- Rio Rosales
Rio Rosales
557 students
- This school
Rio Del Mar
499 students
What this shows Rio Del Mar reports 499 students on the CCD universe file.
How Rio Del Mar compares
Rio Del Mar is a growing campus on CCD: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 31.2:1 | ▲ 45% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 45.2% | ▼ 19% | 55.5% | 51.7% |
| Enrollment | 499 | top 45% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
31.2:1
Leaner classes than 2% of US schools, heavier class loads than most.
499
Bigger than 62% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
45.2%
free-lunch eligible
- 19% 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
31.2:1
students per teacher
- 45% above state mean
Top 97% in California - lower ratio than 3% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
20.8%
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
$18,284
per pupil, district-wide
- below California avg of $18,665
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors1.0 FTE
Per 499 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 2 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.4 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 83.8%
White 6.0%
Asian 4.4%
Two or More 3.2%
African American 2.0%
Native Hawaiian / Pacific Islander 0.6%
Largest group: Hispanic or Latino at 83.8% of enrollment.
Student-body diversity index 29.1/100
Simpson diversity index - at 29.1, Rio Del Mar is less mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
District finance for Rio Elementary reports $18,284 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Rio Del Mar Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Rio Del Sol | Larger | Lower economic need | Lower S:T ratio |
| Rio Real Elementary | Larger | Higher economic need | Lower S:T ratio |
| Rio Vista Middle | Larger | Similar economic need | Lower S:T ratio |
| Rio Del Valle Middle | Similar size | Higher economic need | Lower S:T ratio |
| Rio Rosales | Similar size | Similar economic need | Lower S:T ratio |
Comparisons are relative to Rio Del Mar's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- 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
Nationwide elementary schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~499 students)
Frequently asked questions about Rio Del Mar
How many students attend Rio Del Mar?
Rio Del Mar has 499 students enrolled. It is an elementary school in Oxnard, CA. CCD year-over-year: 416 (2022-23) → 450 (2023-24), up 34.
What is the student-teacher ratio at Rio Del Mar?
The student-teacher ratio at Rio Del Mar is 31.2:1, which is 45% higher than the California average of 21.5:1 and 99% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Rio Del Mar?
45.2% of students at Rio Del Mar are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Rio Del Mar?
The largest demographic group at Rio Del Mar is Hispanic or Latino at 83.8% of enrollment, in Oxnard, CA.
What is the Resource Investment Index for Rio Del Mar?
Rio Del Mar has a Resource Investment Index of 30/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Rio Del Mar rank among elementary schools in Oxnard?
By Resource Investment Index, Rio Del Mar ranks #7 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.
What other schools are in Rio Elementary?
Besides Rio Del Mar, 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.