Rio Mesa High

Rio Mesa High, a sprawling four-year high school in Oxnard, California, overseen by Oxnard Union High, hosts 1,951 students, covering grades 9 through 12. That puts it 133% bigger than the typical public school in California, which averages around 838 students.

Oxnard Union High runs 12 schools in total, collectively educating 16,014 students. Rio Mesa High is one of those campuses.

Demographically, Rio Mesa High shows that nearly all students (87%) are Hispanic. Other groups include 5% Asian, 4% White, 2% multiracial. By comparison, Ventura County as a whole is about 44% Hispanic, so the school skews meaningfully more Hispanic than its surroundings.

Looking at school resources, Staff filings list 85 full-time-equivalent teachers, which works out to roughly 23.0:1 students per teacher. The state averages around 18.2:1, so this campus is higher than the state norm typical. About 73% of enrolled students meet the income threshold for free or reduced-price lunch, often used as a Title I proxy. That share is north of Ventura County's rate of about 59%.

After controlling for student poverty, Rio Mesa High tracks the demographic baseline. The model predicts 36.3% given the school's FRL share; actual proficiency is 30.6%.

In the surrounding community, the surrounding county (Ventura County) logs that the typical household earns roughly $109,797 per year, 36% of adults hold a bachelor's degree or higher, and the poverty rate sits near 7%. Across Ventura County's 238 public schools (combined enrollment of about 147,841 students), Rio Mesa High is one campus in the mix.

Nearest neighbor: Providence, around 0.8 miles off. Within five miles, there are 8 other public schools. On composite proficiency, Rio Mesa High comes 4th of 8 in the immediate cluster, higher than the nearby-schools average of 30.2%.

The campus sits in a commuter-belt setting.

Over the past 7-year window. Looking back 7 years, enrollment at Rio Mesa High has edged down 12%, going from 2,212 students in 2018 to 1,951 in 2025. Over the same period, the Hispanic share increased from 77% to 87%. Class-load math has fell: from 24.6:1 in 2018 to 23.0:1 in 2025.

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