Los Osos High School
| Name | Los Osos High School |
| Grades | Class 09 to Class 12 |
| Address | 6001 Milliken Ave. |
| City | Rancho Cucamonga |
| School District | Chaffey Joint Union High |
| County | San Bernardino County |
| Zipcode | 91737-7709 |
| Phone No. | (909)477-6900 |
| State | California |
| Suburb | Large |
| Students | 2954 |
| Teachers | 117 |
| Student Teacher Ratio | 25.2 students per teacher |
| Charter School | No |
| Magnet School | N/A |
Los Osos High School is located at 6001 Milliken Ave. in Rancho Cucamonga city of San Bernardino County county in California. This school comes under Chaffey Joint Union High. You can call them at (909)477-6900 for more details. This is not a magnet school. Total two thousand nine hundred fifty four students from class 09 to class 12 study in this school who are taught by one hundred seventeen teachers. This is not a charter school. The student teacher ratio of this school is 25.2.