Rancho Cucamonga High

As a big secondary school in Rancho Cucamonga, California, Rancho Cucamonga High serves 3,221 students from grades 9 through 12, overseen by Chaffey Joint Union High. Compared to the state average of about 838 students per school, that is 284% bigger than typical.

Across the 11 schools in Chaffey Joint Union High (22,040 students total), Rancho Cucamonga High accounts for its share of the district's footprint.

Looking at the student body, Rancho Cucamonga High logs that the most-represented group is Hispanic (43%), with the rest of the student body spread across multiple groups; the rest is composed of 20% White, 16% Asian, 14% Black, 6% multiracial. By comparison, San Bernardino County as a whole is about 55% Hispanic, so the school skews meaningfully less Hispanic than its surroundings.

In terms of school funding signals, Staff filings list 128 full-time-equivalent teachers, which works out to roughly 25.1:1 students per teacher. Statewide, the average ratio sits near 18.2:1, putting Rancho Cucamonga High higher than the state norm the norm. About 57% of enrolled students meet the income threshold for free or reduced-price lunch, often used as a Title I proxy. Set against San Bernardino County (around 74%), the school's rate is somewhat below typical.

On a demographically-adjusted basis, Rancho Cucamonga High tracks the demographic baseline. The model predicts 45.3% given the school's FRL share; actual proficiency is 55.7%.

Across the wider county, ACS estimates for San Bernardino County put median household income runs about $85,478, roughly 23% of adults have completed at least a four-year degree, and the poverty rate sits near 11%. Across San Bernardino County's 583 public schools (combined enrollment of about 393,648 students), Rancho Cucamonga High is one campus in the mix.

The closest other public school is Carleton P. Lightfoot Elementary, roughly 0.4 miles away. Within five miles, there are 8 other public schools. Among the 9 schools in that immediate cluster with test data (this one included), Rancho Cucamonga High ranks 9th on composite proficiency, beneath the local average of 67.5%.

Geographically, the school is in a suburban area.

Trend over the last 7 years. Over the past 7-year window, the student count edged down 4%: 3,339 students in 2018 compared to 3,221 in 2025. Over the same period, the White share decreased from 24% to 20%.

On the community side, members of the Rancho Cucamonga High community share and discuss enrollment questions, classroom assignments, and PTA news. The community welcomes input from current and former families.