According to the California Department of Education, Quimby Oak Middle School had a student population of 1,064 students in the 2021-2022 school year. The ethnic breakdown of the student population was as follows:
- Hispanic: 61.4%
- White: 18.3%
- Asian: 13.1%
- African American: 2.8%
- Pacific Islander: 1.1%
- American Indian/Alaska Native: 0.3%
The school had a total of 65 teachers in the 2021-2022 school year, resulting in a student-to-teacher ratio of 16:1. The average class size was 23 students.
Quimby Oak Middle School's academic performance is above the state average. In 2022, the school's students scored an average of 550 on the math portion of the California Assessment of Student Performance and Progress (CAASPP), compared to the state average of 518. On the English language arts portion of the CAASPP, Quimby Oak Middle School's students scored an average of 547, compared to the state average of 511.
The school also offers a variety of extracurricular activities, including sports, clubs, and student government. Sports offered include basketball, cross country, football, soccer, softball, swimming, tennis, track and field, and volleyball. Clubs include art, chess, debate, drama, environmental club, French club, math club, robotics, and science club.