5.2avg / 10

Grossmont Union High School District

School District · La Mesa, California

Last updated: October 2026

Students: 16,566

Teachers (FTE): 123

Avg Rating

5.2

out of 10

Schools

15 high

Enrollment

16,566

Student-Teacher Ratio

134.7:1

Avg Rating

5.2

out of 10

Schools

15 high

Enrollment

16,566

Student-Teacher Ratio

134.7:1

How this district compares

California rank

#648 of 713

districts by avg. composite

Vs. state average

-1.2

below California avg

Per-pupil spending

$18,399

+$752 vs California median

District size

16,566 students

Much larger than California median

The short answer

Grossmont Union High ranks #648 of 713 California districts by overall school rating. Grossmont Union High's schools with real test data average 5.2/10 across 14 schools. Its top-rated schools are Grossmont Middle College High (8.8/10), West Hills High (6.8/10), and Santana High (5.9/10). Schools with estimated (proxy) scores are excluded from this ranking.

Best value · beats the odds

Grossmont Middle College High

Rates 8.8/10 despite 37% of students being economically disadvantaged. That's about 2.0 points higher than its student-poverty level predicts. Roughly as clean a case of strong results without an affluent-ZIP price tag as you'll find among Grossmont Union High schools.

Top-Rated Schools in Grossmont Union High

Ranked by MySchoolScout composite rating using only schools with real test data (14 of 15). "Value" = points above what student poverty predicts. Estimated (proxy) scores are excluded.

#	School	Rating	Level	Value	Enrollment
1	Grossmont Middle College High	8.8 / 10	High	+2.0	51
2	West Hills High	6.8 / 10	High	+0.2	1,515
3	Santana High	5.9 / 10	High	-0.2	1,712
4	Valhalla High	5.8 / 10	High	+0.6	1,845
5	Chaparral High	5.4 / 10	High	+1.2	76
6	Monte Vista High	5.3 / 10	High	+0.8	1,537
7	Grossmont High	4.9 / 10	High	-0.5	2,079
8	Elite Academy	4.7 / 10	High	-0.7	38
9	Mount Miguel High	4.6 / 10	High	+0.2	1,506
10	Granite Hills High	4.4 / 10	High	-1.0	2,414

See all 15 schools — including those with estimated data — in the full directory below. How we rate schools.

About Grossmont Union High

Grossmont Union High is a La Mesa, California school district serving 15 schools.The district educates 16,566 students with a student-teacher ratio of 134.7:1. District-level spending was $18,399 per student in fiscal year 2023 (NCES F-33).

With an average rating of 5.2/10, Grossmont Union High demonstrates solid academic performance.

The highest-rated school in the district is Grossmont Middle College High, which has a composite score of 8.8/10.

In standardized testing, Grossmont Union High students show an average math proficiency of 35.8% and ELA proficiency of 51.3%.

The district includes 15 high schools.

District Map

Schools in Grossmont Union High, colored by MySchoolScout rank. Click a pin for details.

District Average Test Scores

Math Proficiency35.8%

School

State

Not reported

ELA Proficiency51.3%

School

State

Not reported

Average proficiency across all schools in Grossmont Union High with test data.

Schools in Grossmont Union High

15 schools

High Schools15

Grossmont Middle College High

District Details

State: California
City: La Mesa
Total Enrollment: 16,566
Teachers (FTE): 123
District spending per student: $18,399NCES F-33 · FY 2023 · This annual source is three years behind the current year.
Child poverty rate: 13.3%Census SAIPE · 2024
District directory year: 2023

Frequently Asked Questions

How many schools are in Grossmont Union High?

Grossmont Union High has 15 schools in total — 15 high schools. You can explore each school's ratings and details on this page.

What is the average rating for Grossmont Union High?

The average composite rating for Grossmont Union High is 5.2/10. This score is calculated from the individual ratings of all schools with academic data in the district.

What is the district spending per student in Grossmont Union High?

Grossmont Union High's district-level spending was $18,399 per student in fiscal year 2023, according to NCES F-33. This is district context, not an individual-school expense.

What is the student-teacher ratio in Grossmont Union High?

The average student-teacher ratio in Grossmont Union High is 134.7:1.

What is the top-rated school in Grossmont Union High?

Grossmont Middle College High is the highest-rated school in Grossmont Union High with a composite score of 8.8/10.

What are the test scores in Grossmont Union High?

Across schools in Grossmont Union High with test data, the average math proficiency is 35.8% and the average ELA (reading/writing) proficiency is 51.3%. These figures represent the percentage of students meeting or exceeding grade-level standards.

How does Grossmont Union High compare to other districts in California?

Grossmont Union High has an average school rating of 5.2/10 across 15 schools. Families can compare this to other districts in California by visiting individual district pages. Factors like school size, available programs, and community demographics also play a role in choosing the right fit.

How does MySchoolScout rate schools?

MySchoolScout ratings blend student growth, poverty-adjusted academic performance, and learning environment — plus college readiness for high schools. Weights vary by school level, and equity data is shown for context without being factored into the score. Learn more about our rating system on our methodology page.

District Averages

Overall Rating: 5.2/10
Math Proficiency: 35.8%
ELA Proficiency: 51.3%

Resources

🔍Search for District Website 📄Official NCES Data 🏫GreatSchools Profile 📍View on Google Maps

How we rate schools

A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.

See how we rate

Other School Districts in CA

Compare Grossmont Union High with neighboring districts in the state.

See all districts in CA →

Data from NCES Common Core of Data, California Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.