Montclair High

As a substantial 9-12 campus in Montclair, California, Montclair High hosts 2,515 students from grades 9 through 12, operated by Chaffey Joint Union High. That puts it 200% larger than the typical public school in California, which averages around 838 students.

Montclair High is one of 11 schools operated by Chaffey Joint Union High, a district that works with 22,040 students overall.

For racial and ethnic makeup, Montclair High reports that 88% of students identify as Hispanic, making the school strongly Hispanic-majority. The remainder breaks down as 4% Asian, 4% White. That is meaningfully more Hispanic than the county at large, where the share is closer to 55%.

Looking at the economic backdrop, Montclair High shows 107 full-time-equivalent teachers, putting the student-to-teacher ratio at about 23.6:1. That figure is higher than the state norm's 18.2:1 average. About 83% 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, San Bernardino County runs at roughly 74%, so the school's eligibility rate is meaningfully above the surrounding baseline.

On a demographically-adjusted basis, Montclair High tracks the demographic baseline. The model predicts 29.9% given the school's FRL share; actual proficiency is 44.1%.

In the area at large, census data for San Bernardino County shows median household income runs about $85,478, roughly 23% of adults have completed at least a four-year degree, and census figures put the poverty rate at about 11%. Montclair High is one of 583 public schools in San Bernardino County (combined enrollment of about 393,648 students).

Nearest neighbor: Monte Vista Elementary, around 0.3 miles off. Within five miles, there are 8 other public schools. On composite proficiency, Montclair High comes 4th of 8 in the immediate cluster, ahead of the nearby-schools average of 42.9%.

The school occupies an outer-ring site.

Five-year trend. Over the past 7-year window, the student count edged down 13%: 2,899 students in 2018 compared to 2,515 in 2025.

Inside the community feed, members of the Montclair High community share and discuss classroom updates, athletics, and weather closures. The community welcomes input from current and former families.