- Enrollment
- 2,675
- Students per teacher
- 20.9:1
- Resource Index
- 27/100
High school (grades 9-12) · Oxnard, CA
Rio Mesa High
Federal NCES profile for Rio Mesa High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 26/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 062927004521
👥 S:T ratio 17
🌟 Gifted program 30
🎓 Counselors 51
📋 Attendance 5
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Rio Mesa High earns 26/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #6 of 9
- high schools in Oxnard · Resource Index
- 26
- Resource Index · Lower
- 20.8:1
- students per teacher
- 53.3%
- free-lunch eligible
Rio Mesa High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Rio Mesa High ranks #6 of 9 high schools in Oxnard, CA.
School address
District: Oxnard Union High · California
NCES ID 062927004521 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-142 students YoY
Rio Mesa High shrank from 2,220 students in 2022-23 to 2,078 in 2023-24 (-6.4%).
Teacher FTE lost 94.8 → 87.2 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-142 students YoY 062927004521 · Oxnard, CA High · MID · TRAD
1,951 enr · 20.8:1 · 53.3% lunch · RII 26
Nearest enrollment peer: Pacifica High (2,675 students)
Rio Mesa High shrank from 2,220 students in 2022-23 to 2,078 in 2023-24 (-6.4%). Teacher FTE lost 94.8 → 87.2 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Rio Mesa High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Pacifica High
Pacifica High
2,675 students
- Oxnard High
Oxnard High
2,452 students
- Channel Island
Channel Islands High
2,380 students
- Adolfo Camaril
Adolfo Camarillo High
1,969 students
- This school
Rio Mesa High
1,951 students
- Hueneme High
Hueneme High
1,913 students
What this shows Rio Mesa High reports 1,951 students on the CCD universe file.
How Rio Mesa High compares
Rio Mesa High is a shrinking 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 | 20.8:1 | ▼ 3% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 53.3% | ▼ 4% | 55.5% | 51.7% |
| Enrollment | 1,951 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20.8:1
Leaner classes than 13% of US schools, heavier class loads than most.
1,951
Bigger than 98% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
53.3%
free-lunch eligible
- 4% 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
20.8:1
students per teacher
- 3% below state mean
Top 42% in California - lower ratio than 58% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
38.0%
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
$17,674
per pupil, district-wide
- below California avg of $18,665
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors8.0 FTE
Per 244 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 127 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 6.5 per 100 students. Reported via the Civil Rights Data Collection. Includes 8 expulsions.
Student demographics
Hispanic or Latino 87.5%
Asian 4.7%
White 4.4%
Two or More 2.2%
African American 1.0%
Native Hawaiian / Pacific Islander 0.1%
Largest group: Hispanic or Latino at 87.5% of enrollment.
Student-body diversity index 23.0/100
Simpson diversity index - at 23.0, Rio Mesa High is less mixed than the California school average of 46.0.
Programs
AP courses offered 3
District finance for Oxnard Union High reports $17,674 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Rio Mesa High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Pacifica High | Larger | Higher economic need | Similar S:T ratio |
| Oxnard High | Larger | Similar economic need | Similar S:T ratio |
| Channel Islands High | Similar size | Higher economic need | Higher S:T ratio |
| Adolfo Camarillo High | Similar size | Lower economic need | Higher S:T ratio |
| Hueneme High | Similar size | Higher economic need | Similar S:T ratio |
Comparisons are relative to Rio Mesa High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,452
- Students per teacher
- 22.1:1
- Resource Index
- 24/100
- Enrollment
- 2,380
- Students per teacher
- 22.5:1
- Resource Index
- 20/100
- Enrollment
- 1,969
- Students per teacher
- 25.9:1
- Resource Index
- 29/100
- Enrollment
- 1,913
- Students per teacher
- 19.7:1
- Resource Index
- 26/100
Similar high schools in Oxnard
6 comparable high schools (grades 9-12) serving the same city.
Pacifica High
Standard public school
2,675 students 20.9:1 students per teacher
Oxnard High
Standard public school
2,452 students 22.1:1 students per teacher
Channel Islands High
Standard public school
2,380 students 22.5:1 students per teacher
Hueneme High
Standard public school
1,913 students 19.7:1 students per teacher
Vista Real Charter High
Standard public school
1,271 students 16.7:1 students per teacher
Condor High
Alternative education program
411 students 19.6:1 students per teacher
Nationwide high 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 (~1,951 students)
Similar student-teacher ratio (~20.8:1)
Frequently asked questions about Rio Mesa High
How many students attend Rio Mesa High?
Rio Mesa High has 1,951 students enrolled. It is a high school in Oxnard, CA. CCD year-over-year: 2,220 (2022-23) → 2,078 (2023-24), down 142.
What is the student-teacher ratio at Rio Mesa High?
The student-teacher ratio at Rio Mesa High is 20.8:1, which is 3% lower than the California average of 21.5:1 and 32% 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 Rio Mesa High?
53.3% of students at Rio Mesa High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Rio Mesa High?
The largest demographic group at Rio Mesa High is Hispanic or Latino at 87.5% of enrollment, in Oxnard, CA.
What is the Resource Investment Index for Rio Mesa High?
Rio Mesa High has a Resource Investment Index of 26/100 (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 Mesa High rank among high schools in Oxnard?
By Resource Investment Index, Rio Mesa High ranks #6 of 9 high 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 high schools in Oxnard on the city page.
What other schools are in Oxnard Union High?
Besides Rio Mesa High, Oxnard Union High also operates Pacifica High (2,675 students), Oxnard High (2,452 students), and Channel Islands High (2,380 students). See the Oxnard Union High district page for the complete list.