Los Osos High School
6001 Milliken Avenue, Rancho Cucamonga, CA 91737View on map
- Public
- Rancho Cucamonga
- 698 seniors
- 2,735 students
Los Osos High School is a public high school in Rancho Cucamonga (Chaffey Joint Union High) with 698 seniors. In fall 2025, 78% of its 242 University of California applicants were admitted, compared with a county median of 80%. Its students applied most often to UC Irvine (UCI), UC Riverside (UCR), and UC San Diego (UCSD). 73% of the class of 2023 completed the A–G courses UC requires.
UC admit rate
78%
189 of 242 applicants, fall 2025
Seniors admitted to a UC
27%
189 of 698 seniors
Seniors who applied to UC
35%
242 of 698 seniors
UC Los Angeles (UCLA) admit rate
9.8%
17 of 173 applicants, fall 2025
UC Berkeley (Cal) admit rate
12%
15 of 127 applicants, fall 2025
Campus by campus, fall 2025
The share of this school's applicants each campus admitted, beside the campus's rate for everyone else. Hardest campus first.
University of California
Los Osos High School applicants did better than all California applicants at 1 of 9 campuses, about the same at 6 and worse at 2.
- Los AngelesAbout the same
10%
17 of 173 admitted
This school10%All CA10%
Admitted students' average GPA 4.25 (all applicants 3.92)
- BerkeleyAbout the same
12%
15 of 127 admitted
This school12%All CA13%
Admitted students' average GPA 4.25 (all applicants 3.96)
- Irvine6 pts higher
29%
57 of 199 admitted
This school29%All CA22%
Admitted students' average GPA 4.21 (all applicants 3.87)
- San Diego8 pts lower
17%
31 of 184 admitted
This school17%All CA25%
Admitted students' average GPA 4.23 (all applicants 3.93)
- Santa Barbara4 pts lower
29%
37 of 129 admitted
This school29%All CA32%
Admitted students' average GPA 4.24 (all applicants 3.91)
- DavisAbout the same
39%
34 of 87 admitted
This school39%All CA37%
Admitted students' average GPA 4.19 (all applicants 3.92)
- Santa CruzAbout the same
69%
50 of 72 admitted
This school69%All CA71%
Admitted students' average GPA 4.01 (all applicants 3.75)
- RiversideAbout the same
84%
156 of 185 admitted
This school84%All CA87%
Admitted students' average GPA 3.97 (all applicants 3.83)
- MercedAbout the same
95%
54 of 57 admitted
This school95%All CA96%
Admitted students' average GPA 3.97 (all applicants 3.91)
Fall 2025. A student admitted to several campuses counts once at each one. All CA is the campus’s admit rate that fall for applicants from every California high school. Within 3 points counts as about the same. GPA is the UC-calculated GPA (weighted, capped).
California State University
Los Osos High School applicants did better than the campus overall at 1 of 5 campuses, about the same at 4.
- Long BeachAbout the same
48%
50 of 105 admitted
This school48%Overall47%
- Pomona16 pts higher
90%
120 of 134 admitted
This school90%Overall74%
- FullertonAbout the same
89%
116 of 131 admitted
This school89%Overall87%
- San MarcosAbout the same
93%
55 of 59 admitted
This school93%Overall96%
- San BernardinoAbout the same
95%
76 of 80 admitted
This school95%Overall98%
Fall 2025. A student admitted to several campuses counts once at each one. Overall is the campus’s admit rate for all its applicants, from federal IPEDS data (fall 2023, the latest published). Within 3 points counts as about the same.
Where graduates go
Class of 2023 (666 graduates), the latest published by fall 2025, within 12 months of graduating.
Any college
81%
542 of 666 graduates
UC or CSU
33%
218 graduates
Community college
36%
237 graduates
| Destination | Graduates | Share |
|---|---|---|
| UC | 115 | 17% |
| CSU | 103 | 15% |
| CA private college | 42 | 6% |
| Out of state | 45 | 7% |
| Community college | 237 | 36% |
| Not enrolled | 124 | 19% |
| Enrolled in college | 542 | 81% |
| Total | 666 | 100% |
How each student group compares
Compare college-going across student groups
- Gender: Male, Female
- Race & ethnicity: Hispanic or Latino, White, Asian, Black or African American, Filipino, Two or more races
- Student need: Low-income, Students with disabilities, Homeless, English learners
Advanced Placement
18
AP courses offered
2023–24 school year · US Dept. of Education Civil Rights Data Collection
69
AP class sections
Counts every section taught, so it is larger than the number of different AP courses.
37% of students are in AP courses
2024–25 school year · California School Accountability Report Card
49%
of graduating seniors passed at least two AP exams or courses
325 of 662 graduates
A score of 3 or higher on exams or a C- or better in courses. Not comparable with the exam-only share.
2025–26 school year · California Department of Education (College/Career Indicator)
39%
of graduating seniors scored 3 or higher on at least two AP exams
285 of 732 graduates
2023–24 school year · California Department of Education (College/Career Indicator)
Subject areas
- English: 15 classes
- Foreign language: 6 classes
- Mathematics: 7 classes
- Science: 13 classes
- Social science: 25 classes
Academic context
State test (CAASPP), juniors tested in 2026, and the share of low-income students. A–G is the class of 2023. The tick is the county median.
- Juniors meeting the English standard 83%County median 53%
- Juniors meeting the math standard 59%County median 21%
- Juniors exceeding the English standard 52%County median 21%
- Juniors exceeding the math standard 33%County median 7%
- Low-income students 45%County median 73%
- Graduates completing courses 73%County median 49%