La Mesa Junior High

La Mesa Junior High is one of the expansive 6-8 campuss in Santa Clarita, California, overseen by William S. Hart Union High, with 1,017 students on its rolls from grades 7 through 8. That puts it 54% larger than the typical public school in California, which averages around 659 students.

Within William S. Hart Union High, which oversees 16 schools and 20,465 students, La Mesa Junior High is one campus in the system.

In terms of who attends, La Mesa Junior High logs that the largest single group is Hispanic, at 57% of enrollment. Beyond that, the school logs 18% White, 13% Asian, 8% Black, 4% multiracial. That is visibly more Hispanic than the county at large, where the share is closer to 48%.

Looking at the economic backdrop, La Mesa Junior High reports 50 full-time-equivalent teachers, putting the student-to-teacher ratio at about 20.2:1. That tracks the state average closely. About 48% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. By comparison, Los Angeles County runs at roughly 70%, so the school's eligibility rate is lower than the surrounding baseline.

On a demographically-adjusted basis, La Mesa Junior High sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 51.0%; this one delivers 41.8%.

Zooming out to the county, community-level numbers for Los Angeles County indicate median household income runs about $90,112, roughly 36% of adults have completed at least a four-year degree, and census figures put the poverty rate at about 10%. Across Los Angeles County's 2244 public schools (combined enrollment of about 1,265,907 students), La Mesa Junior High is one campus in the mix.

Nearest neighbor: Golden Valley High, around 0.8 miles off. Counting just inside five miles, 8 other public schools cluster around La Mesa Junior High. Ranking that nearby cluster on reported proficiency puts La Mesa Junior High at 5th of 8; the average score across the group is 44.5%.

The school occupies a residential site.

Five-year trend. Over the past 7-year window, the student count declined 14%: 1,188 students in 2018 compared to 1,017 in 2025.

On allk12, recent activity here tends to focus on science fair prep, picture-day reminders, and bus-route questions. Posting is open to anyone connected to the school.