Los Osos High
6001 Milliken Ave., Rancho Cucamonga, CA 91737 Map
Math (met standard)
59%
+27
state 32% · 2025-26
English (met standard)
83%
+26
state 57% · 2025-26
Science (met standard)
51%
+15
state 36% · 2025-26
Low income
44%
free or reduced-price lunch
Students
2,759
2024-25
Students per teacher
25.8
2024-25
Test score trends
Share of students who met or exceeded the state standard each year.
Latest results by grade
| Grade | Math | English | Science |
|---|---|---|---|
| Grade 11 | 59% state 32% · 2025-26 | 83% state 57% · 2025-26 | — |
| All grades | 59% state 32% · 2025-26 | 83% state 57% · 2025-26 | 51% state 36% · 2025-26 |
Results by year (all grades)
| School year | Math | English | Science |
|---|---|---|---|
| 2025-26 | 59% state 32% | 83% state 57% | 51% state 36% |
| 2024-25 | 51% state 31% | 79% state 57% | 38% state 28% |
| 2023-24 | 49% state 28% | 82% state 56% | 45% state 27% |
| 2022-23 | 51% state 27% | 79% state 55% | 44% state 27% |
| 2021-22 | 53% state 27% | 82% state 55% | 35% state 27% |
| 2020-21 | 64% state 34% | 77% state 59% | 41% state 28% |
| 2018-19 | 58% state 32% | 81% state 57% | 30% state 26% |
| 2017-18 | 53% state 31% | 75% state 56% | — |
| 2016-17 | 52% state 32% | 71% state 60% | — |
| 2015-16 | 55% state 32% | 80% state 59% | — |
| 2014-15 | 53% state 30% | 72% state 56% | — |
Graduation & college
4-year graduation rate
96%
state 88% · 2025-26
Graduates meeting UC/CSU (A–G)
80%
state 55% · 2025-26
College-going rate
81%
state 66% · 2022-23
Graduation rate: students who earned a regular diploma within four years. UC/CSU: share of graduates who completed the A–G courses required by the University of California and California State University. College-going: share of high school completers who enrolled in any college within 12 months.
Students
Race and ethnicity, 2024-25
- Asian 23%
- White 24%
- Hispanic 41%
- Black 6%
- Two or more 5%
- Other 0%
Year-by-year history is loaded from the NCES Common Core of Data (2017-18 onward).
Nearby schools
2025-26 results
Subject percentages show the share of students who met or exceeded the state standard.
| Pick to compare | |||||
|---|---|---|---|---|---|
|
Rancho Cucamonga High
Grades 9–12
· Chaffey Joint Union High
|
1.1 mi |
46%
+14
vs state
|
70%
+12
vs state
|
57% | |
|
Etiwanda High
Grades 9–12
· Chaffey Joint Union High
|
2.8 mi |
47%
+15
vs state
|
76%
+19
vs state
|
54% | |
|
Alta Loma High
Grades 9–12
· Chaffey Joint Union High
|
3.6 mi |
39%
+7
vs state
|
68%
+11
vs state
|
60% | |
|
Inland Empire Springs Charter
Grades K–12
Charter
· Inland Empire Springs Charter District
|
4.3 mi |
38%
−2
vs state
|
54%
+6
vs state
|
61% |
No schools match this filter.