San Marino High

San Marino High is a medium-sized four-year high school in San Marino, California, part of San Marino Unified. The school serves 886 students in grades 9 through 12.

San Marino High is one of 4 schools operated by San Marino Unified, a district that enrolls 3,083 students overall.

In terms of who attends, San Marino High records that the largest single group is Asian, at 61% of enrollment. Beyond that, the school records 18% White, 11% multiracial, 9% Hispanic. By comparison, Los Angeles County as a whole is about 15% Asian, so the school skews noticeably more Asian than its surroundings.

Looking at the economic backdrop, The school currently runs with 43 full-time-equivalent teachers, for a student-teacher ratio near 20.4:1. Statewide, the average ratio sits near 18.2:1, putting San Marino High higher than the state norm the norm. About 12% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. By comparison, Los Angeles County runs at roughly 70%, so the school's eligibility rate is meaningfully below the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), San Marino High sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 72.8%; this one delivers 86.0%.

In the area at large, census data for Los Angeles County shows median household earnings sit near $90,112, 36% of adults hold a bachelor's degree or higher, and census figures put the poverty rate at about 10%. San Marino High is one of 2244 public schools in Los Angeles County (combined enrollment of about 1,265,907 students).

Nearest neighbor: Carver Elementary, around 0.5 miles off. Within five miles, there are 8 other public schools. Ranking that nearby cluster on reported proficiency puts San Marino High at 3rd of 9; the average score across the group is 71.8%.

The school occupies a suburban site.

Five-year trend. Looking back 7 years, enrollment at San Marino High has decreased 21%, going from 1,123 students in 2018 to 886 in 2025. White enrollment moved from 25% to 18% across the same window.

In the discussion threads here, recent activity here tends to focus on open house dates, ride-share offers, and field-trip permission slips. Anyone with firsthand experience at this school can post or comment.