San Marcos High

San Marcos High is one of the big secondary schools in San Marcos, California, overseen by San Marcos Unified, with 3,067 students on its rolls from grades 9 through 12. That puts it 266% above the typical public school in California, which averages around 838 students.

Across the 19 schools in San Marcos Unified (18,837 students total), San Marcos High accounts for its share of the district's footprint.

On demographics, San Marcos High shows that the most-represented group is Hispanic (42%), with the rest of the student body spread across multiple groups; the rest is composed of 42% White, 8% Asian, 7% multiracial.

Looking at school resources, On paper, San Marcos High has 121 full-time-equivalent teachers, translating to a class-load average of around 25.3:1. Statewide, the average ratio sits near 18.2:1, putting San Marcos High higher than the state norm the norm. An estimated 32% of students are eligible for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. By comparison, San Diego County runs at roughly 54%, so the school's eligibility rate is meaningfully below the surrounding baseline.

On a demographically-adjusted basis, On a poverty-adjusted basis, San Marcos High sits in the bottom 10% statewide. Predicted proficiency from the FRL regression is roughly 60.5%; actual is 41.5%, a gap of -19.0 points.

Across the wider county, the surrounding county (San Diego County) reports that median household income runs about $106,268, roughly 43% of adults have completed at least a four-year degree, and the poverty rate sits near 7%. In all, San Diego County runs 766 public schools (combined enrollment of about 467,437 students), of which San Marcos High is one.

The closest other public school is High Tech High North County, roughly 0.3 miles away. Within five miles, there are 8 other public schools. Ranking that nearby cluster on reported proficiency puts San Marcos High at 4th of 5; the average score across the group is 53.5%.

Geographically, the school is in a bedroom-community area.

Over the past 7-year window. Over the past 7-year window, the student count declined 8%: 3,338 students in 2018 compared to 3,067 in 2025. The White share of enrollment decreased from 47% to 42% over that span. Class-load math has narrowed: from 29.6:1 in 2018 to 25.3:1 in 2025.

On this page, members of the San Marcos High community share and discuss pickup logistics, teacher feedback, and after-school programs. The community welcomes input from current and former families.