1
What's the vibe like in the hallways at Rio Mesa High right now?
Community prompt from u/allk12. Replies below.
Enrollment
1,951
High
DISTRICT 1,335 · STATE 838
SCHOOL COMMUNITY·OXNARD UNION HIGH·NCES 062927004521
Rio Mesa High
545 Central Ave., Oxnard, CA 93030 · (805) 278-5500 · Ventura County
GRADES 09–12HIGH21-SUBURBTITLE IREGULAR SCHOOL1,951 STUDENTS
C
allk12 Grade
Scored higher than 29% of California public high schools
- CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- CBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- BThree-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded California public high schools
Student : Teacher
23.0:1
85 FTE teachers
DISTRICT 21.6:1 · STATE 18.2:1
Free / Reduced Lunch
73%
1,416 students
DISTRICT 74% · STATE 65%
Community
6
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 491 | 25% |
| Grade 10 | 459 | 24% |
| Grade 11 | 525 | 27% |
| Grade 12 | 476 | 24% |
Student demographics
23%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 29% · STATE 62% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
CAASPP 2024-25 . % met or exceeded standardEnglish Language Arts
46.4%
CA avg 49.1% . -2.6pp since 2014
Math
20.2%
CA avg 37.7% . -4.8pp since 2014
What this means: On the CAASPP, California's statewide test, about 46 of every 100 students at this school read and write at grade level and about 20 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are down about 3 points since 2014, while math scores are down about 5 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 21.1% | 25.3% | 23.2% | 30.4% |
| Math | 8.4% | 11.8% | 22.1% | 57.8% |
Share of tested students at each CAASPP level. Each student counts in one level, so a row adds to about 100%.
CAASPP results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 46.4% | 20.2% |
| 2023-24 | 46.4% | 14.9% |
| 2022-23 | 49.9% | 15.8% |
| 2021-22 | 43.0% | 15.9% |
| 2020-21 | 48.5% | 29.0% |
| 2018-19 | 47.1% | 24.0% |
| 2017-18 | 36.6% | 23.4% |
| 2016-17 | 46.7% | 22.5% |
| 2015-16 | 45.0% | 26.0% |
| 2014-15 | 49.0% | 25.0% |
% met or exceeded standard, all students and all tested grades.
Source: CAASPP. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
32.0%
composite math + reading, all grades
Predicted
37.0%
based on CA schools with similar FRL share
Beats by
-5.0pp
below demographic expectation
What this means: About 32% of students here test proficient in math and reading, compared with the roughly 37% typical for California schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among California's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Rio Mesa High
Rio Mesa High's state test result (32.0% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Rio Mesa High this school | 1,951 | 72.6% | 32.0% |
| Pacheco High Los Banos | 1,725 | 71.1% | 37.3% |
| Los Altos High Hacienda Heights | 1,592 | 70.2% | 44.5% |
| Patriot High Jurupa Valley | 2,399 | 74.4% | 32.4% |
| Oxnard High Oxnard | 2,452 | 76.1% | 33.5% |
| Brawley Union High Brawley | 1,863 | 70.7% | 44.0% |
Matched among California high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Rio Mesa High ranks
Among high schools| Measure | This school | In California | In Ventura County |
|---|---|---|---|
| State test proficiency ranked highest first | 32.0% | #741 of 1,052 | #19 of 22 |
| Math proficiency ranked highest first | 20.2% | #671 of 1,056 ▲ 99 | #17 of 22 ▲ 1 |
| Reading proficiency ranked highest first | 46.4% | #777 of 1,056 ▼ 35 | #19 of 22 no change |
| 3-year test score change ranked biggest gain first | +3.8pp | #410 of 1,044 | #10 of 22 |
| Enrollment ranked largest first | 1,951 | #313 of 2,093 | #6 of 39 |
| Students per teacher ranked fewest first | 23.0:1 | #996 of 1,352 | #16 of 28 |
| Diversity index ranked most diverse first | 22.9% | #1,060 of 1,351 | #21 of 28 |
| Free and reduced lunch ranked highest share first | 72.6% | #811 of 1,575 | #13 of 32 |
| Enrollment change since 2017-18 ranked steepest decline first | -11.8% | #398 of 802 | #14 of 23 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
1,951
-430 (-18%) vs 2020
+8% since 1990-91, when it was 1,809
Student : Teacher
23.0:1
was 24.3:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 1,951 | 84.8 | 23.0:1 | 73% (1,416) |
| 2023-24 | 2,078 | 87.2 | 23.8:1 | 65% (1,357) |
| 2022-23 | 2,220 | 94.8 | 23.4:1 | 60% (1,339) |
| 2020-21 | 2,381 | 98 | 24.3:1 | 64% (1,513) |
| 2017-18 | 2,212 | 90 | 24.6:1 | 63% (1,400) |
| 2015-16 | 2,183 | 83 | 26.3:1 | 52% (1,134) |
| 2010-11 | 2,142 | N/A | N/A | 37% (799) |
| 2000-01 | 2,437 | 98 | 24.9:1 | 42% (1,031) |
| 1990-91 | 1,809 | 72 | 25.1:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Rio Mesa High.
Since 2017-18: students down 12% (2,212 to 1,951); teachers down 6% (90 to 84.8).
About Rio Mesa High
Rio Mesa High serves students in Oxnard, California, as a high-enrollment high school. The school has 1,951 students in 2024-25 across grades 9 through 12. By comparison, high schools in California enroll about 838 students on average.
Rio Mesa High is run by Oxnard Union High, whose 12 schools enroll 16,014 students.
Hispanic students are 87% of those enrolled at Rio Mesa High. Beyond that, enrollment is 5% Asian, 4% White, and 2% multiracial. In Ventura County overall, about 44% of residents are Hispanic. A diversity index of 23% means there is a 23% chance two randomly chosen students at Rio Mesa High are from different groups.
Teacher count: 84.8 full-time equivalents. Student-to-teacher ratio: 23.0:1. The average for high schools in California, 18.2:1, is lower. Roughly 73% of students come from households that qualify for free or reduced-price lunch. It compares with 59% for public schools in Ventura County.
Rio Mesa High earns a C on the allk12 Grade, which blends test scores, results against poverty-based expectations, and the three-year trend. It scored higher than 29% of California public high schools.
Based on its free or reduced-price lunch share, the BeatsExpectations model predicts an average proficiency rate across its state test results of 37.0% for Rio Mesa High. The school posts 32.0%, 5.0 points below the prediction.
Five-year Census Bureau estimates for Ventura County show that median household income comes to about $109,797, a bachelor's degree or higher is held by about 36% of adults, and the share of residents below the poverty line is 7%. Ventura County has 238 public schools with about 147,841 students, including Rio Mesa High.
Measured in a straight line, Providence is about 0.8 miles from Rio Mesa High. Within five miles are at least 8 other public schools. Of 8 schools in the immediate area with test results, Rio Mesa High ranks 4th on average proficiency.
For locale, NCES codes Rio Mesa High as Suburb: Large.
The school shrank from 2,381 students in 2020-21 to 1,951 in 2024-25. Federal data show the ratio falling from 24.3:1 to 23.0:1.
This page is set up for the Rio Mesa High community to discuss homework, tutoring, and testing dates. Members of the school community can share what they know.
Ventura County at a glance
View full county profilePopulation
837,469
Census ACS
Median income
$109,797
Household, ACS
Bachelor's+
36%
Adults 25+
Poverty rate
7%
Below federal line
Schools in county
238
147,841 students
Quick facts
Related schools
Other schools in Oxnard Union High
- Pacifica HighHigh · 2,675 students
- Oxnard HighHigh · 2,452 students
- Channel Islands HighHigh · 2,380 students
- Adolfo Camarillo HighHigh · 1,969 students
- Hueneme HighHigh · 1,913 students
- Rancho Campana HighHigh · 826 students
Other schools in Oxnard
- Pacifica HighHigh · 2,675 students
- Oxnard HighHigh · 2,452 students
- Channel Islands HighHigh · 2,380 students
- Hueneme HighHigh · 1,913 students
- Vista Real Charter HighHigh · 1,271 students
- Charles Blackstock Junior HighMiddle · 1,239 students
Nearby schools
- Providence0.8 mi · 35
- Rio Plaza Elementary1.2 mi · 455
- Rio Del Mar1.4 mi · 499
- Rio del Valle Middle1.5 mi · 569
- Rio Vista Middle1.6 mi · 637
- Rio Real Elementary1.9 mi · 794
Frequently asked questions
About Rio Mesa HighWhat is the total enrollment at Rio Mesa High?
Rio Mesa High enrolls approximately 1,951 students in grades 09-12.
What grades does Rio Mesa High serve?
Rio Mesa High serves grades 09-12.
What is the student-teacher ratio at Rio Mesa High?
The student-to-teacher ratio at Rio Mesa High is approximately 23.0:1 (85 FTE teachers).
What is the student diversity at Rio Mesa High?
Student demographics at Rio Mesa High are roughly 4% White, 87% Hispanic, 1% Black, 5% Asian, 2% Two or more.
What district is Rio Mesa High in?
Rio Mesa High is part of Oxnard Union High.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.