Grossmont High School is a public high school in eastern San Diego County, California. Opened in 1920, it is the oldest public high school in East County and the first of twelve high schools currently in Grossmont Union High School District. The school has an approximate enrollment of 2,800 students.
Serving 2,172 students in grades 9-12, Grossmont High School ranks in the top 50% of all schools in California for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 23% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 66% (which is higher than the California state average of 47%).
The student-teacher ratio of 24:1 is higher than the California state level of 21:1.
Minority enrollment is 67% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).
Quick Facts (26-27)
- Grades: 9-12
- Enrollment: 2,172 students
- Student-Teacher Ratio: 24:1
- Minority Enrollment: 67%
- Graduation Rate: 79% (Btm 50% in CA)
- Overall Testing Rank: Top 50%
- Math Proficiency: 23% (Btm 50%)
- Reading Proficiency: 66% (Top 20%)
- Science Proficiency: 27% (Top 50%)
- Attendance Zone: Grossmont High serves the west part of La Mesa, CA, covering an attendance area of approximately 11 square miles. Most students live within a 2-mile distance from the school, with the furthest edge of the zone extending about 3.7 miles away, making for a typical drive time of 5 to 10 minutes.
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Grossmont High School ranks among the top 20% of public schools in California for:
Category
Attribute
Reading/Language Arts Proficiency
School Overview
Grossmont High School's student population of 2,172 students has declined by 5% over five school years.
The teacher population of 89 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
2,172 students
Showing 2015–2025. Full 39-year historical data available below ↓
Total Classroom Teachers
89 teachers
Showing 2014–2025. Full 39-year historical data available below ↓
Year Founded
1920
School Calendar
School Rankings
Grossmont High School ranks within the top 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Grossmont High School is 0.67, which is more than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#3549 out of 9523 schools
(Top 50%)
(Top 50%)
Showing 2013–2023. Full 14-year historical data available below ↓
Math Test Scores (% Proficient)
23%
34%
Showing 2013–2023. Full 14-year historical data available below ↓
Reading/Language Arts Test Scores (% Proficient)
66%
47%
Showing 2012–2022. Full 13-year historical data available below ↓
Science Test Scores (% Proficient)
27%
29%
Student-Teacher Ratio
24:1
21:1
Showing 2013–2025. Full 39-year historical data available below ↓
Asian
5%
12%
Showing 2015–2025. Full 38-year historical data available below ↓
Hispanic
46%
56%
Showing 2015–2025. Full 38-year historical data available below ↓
Black
8%
5%
Showing 2015–2025. Full 38-year historical data available below ↓
White
33%
20%
Showing 2015–2025. Full 38-year historical data available below ↓
Hawaiian
1%
n/a
Two or more races
7%
6%
Showing 2015–2025. Full 17-year historical data available below ↓
All Ethnic Groups
Showing 2015–2025. Full 38-year historical data available below ↓
Graduation Rate
79%
86.2%
Showing 2014–2023. Full 13-year historical data available below ↓
Chronically Absent Students
(22-23)24.3%
27.7%
Eligible for Free Lunch
40%
54%
Showing 2015–2025. Full 34-year historical data available below ↓
Eligible for Reduced Lunch
24%
8%
Showing 2015–2025. Full 27-year historical data available below ↓
School Statewide Testing
School District Name
Sports
Colors
California Distinguished & Gold Ribbon School
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Grossmont High School's ranking?
Grossmont High School is ranked #3549 out of 9,523 schools, which ranks it among the top 50% of public schools in California.
What schools are Grossmont High School often compared to?
Grossmont High Schoolis often viewed alongside schools like West Hills High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
23% of students have achieved math proficiency (compared to the 34% CA state average), while 66% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Grossmont High School?
The graduation rate of Grossmont High School is 79%, which is lower than the California state average of 86.2%.
How many students attend Grossmont High School?
2,172 students attend Grossmont High School.
What is the racial composition of the student body?
46% of Grossmont High School students are Hispanic, 33% of students are White, 8% of students are Black, 7% of students are Two or more races, 5% of students are Asian, and 1% of students are Hawaiian.
What is the student-teacher ratio of Grossmont High School?
Grossmont High School has a student ration of 24:1, which is higher than the California state average of 21:1.
What grades does Grossmont High School offer ?
Grossmont High School offers enrollment in grades 9-12
What school district is Grossmont High School part of?
Grossmont High School is part of Grossmont Union High School District.
School Reviews
2 10/10/2025
Grossmont used to be a good school, but not anymore. It qualified to get a Distinguished School award from the State, but once that was achieved, all the programs that it used to get the honor were dropped. Standards have been lowered, and very few AP classes are offered.
2 10/10/2025
Grossmont is a poor excuse for a high school. One of my kids commented about this school saying, Education is about power, not about teaching. This sums up Grossmont and the way it is run. The year after it was made Distinguished School honor, all the programs that gave it that honor were cut. So much for the students. The principal has her favorites, and the teachers use that style as well, for example in drama, sports, and ASB. It is NOT an environment that fosters achievement, but rather one that fosters favoritism, nepotism, and fear. Please go to a different school
5 10/10/2025
I just graduated from this school and i really loved it. By far it was the best school i have ever been to and i've tried different high schools, but this school truly is an awesome school to go to. Of course every school has there pros and cons, but no school is perfect! I recommend going to this school you will have an incredible experience. :)
5 10/10/2025
As a former student and graduate I would say that my experience and education were exceptional. In the beginning, it was a horrible start. I was hanging with the wrong crowd and started to be a lot of trouble. My parents and the Principal of Grossmont did not give up on me and gave me another chance. All of my teachers were very supportive. As a freshman, I had a GPA of 2.5 and was an applied art student struggling in all subjects. Upon graduating my GPA was 3.8 and all classes my junior and senior year were college prep and was also elected to student government. Grossmont made me into the person I am today and made efforts to achieve my educational and career goals.
Review Grossmont High School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
Can Your Child Get Into School Clubs and Activities?
Discover whether your child can access advertised school clubs and activities, including enrollment limits, tryouts, fees, transportation, scheduling conflicts, and essential questions parents should ask before choosing schools today.
Who Supervises Students When Their Teacher Is Out?
Discover who supervises students when regular teachers are absent, how schools arrange classroom coverage, what qualifications substitutes need, and which questions parents should ask about safety and learning continuity.
When the School Nurse Isn't There: Parent Guide
Learn what happens when school nurses are absent, how public schools handle medications and emergencies, and which essential questions parents should ask to protect their children's health and safety daily.
