Grossmont High

Grossmont High is one of the well-populated high schools in La Mesa, California, one of the schools within Grossmont Union High, with 2,172 students on its rolls from grades 9 through 12. By comparison, California's public schools average about 838 students each, so Grossmont High sits 159% larger than that benchmark.

Grossmont Union High comprises 15 schools with combined enrollment of 16,401 students; Grossmont High is among them.

For racial and ethnic makeup, Grossmont High logs that the largest single group is Hispanic at 46%, but no single group is in the majority. Other groups include 33% White, 8% Black, 8% multiracial, 5% Asian. That is noticeably more Hispanic than the county at large, where the share is closer to 35%.

Looking at school resources, Staff filings list 89 full-time-equivalent teachers, which works out to roughly 24.3:1 students per teacher. The state averages around 18.2:1, so this campus is higher than the state norm typical. About 64% of enrolled students meet the income threshold for free or reduced-price lunch, often used as a Title I proxy. By comparison, San Diego County runs at roughly 54%, so the school's eligibility rate is above the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), Grossmont High performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 41.4%, the actual is 42.5%, a residual of +1.1 points.

Zooming out to the county, the surrounding county (San Diego County) logs that the typical household earns roughly $106,268 per year, roughly 43% of adults have completed at least a four-year degree, and roughly 7% of residents live below the federal poverty line. Grossmont High is one of 766 public schools in San Diego County (combined enrollment of about 467,437 students).

The closest other public school is Northmont Elementary, roughly 0.7 miles away. Counting just inside five miles, 8 other public schools cluster around Grossmont High. On composite proficiency, Grossmont High comes 4th of 6 in the immediate cluster, below the nearby-schools average of 43.6%.

Geographically, the school is in a commuter-belt area.

Five-year trend. Over the past 7-year window, the student count held roughly steady: 2,219 students in 2018 compared to 2,172 in 2025. The White share of enrollment decreased from 41% to 33% over that span.

Within the allk12 community for this school, posts here usually surface around enrollment questions, classroom assignments, and PTA news. Members of the school community can share what they know.