Cosumnes Oaks High

Cosumnes Oaks High is a high-enrollment 9-12 campus in Elk Grove, California, operated by Elk Grove Unified. The school teaches 2,109 students in grades 9 through 12. By comparison, California's public schools average about 838 students each, so Cosumnes Oaks High sits 152% larger than that benchmark.

Cosumnes Oaks High is one of 67 schools operated by Elk Grove Unified, a district that hosts 63,232 students overall.

Demographically, Cosumnes Oaks High reports that the largest single group is Asian at 43%, but no single group is in the majority. The remainder comes out to 20% Hispanic, 14% White, 12% Black, 11% multiracial. The wider county runs roughly 18% Asian, putting the school's mix considerably more Asian than the area baseline.

On the resource side, Cosumnes Oaks High shows 98 full-time-equivalent teachers, putting the student-to-teacher ratio at about 21.4:1. Statewide, the average ratio sits near 18.2:1, putting Cosumnes Oaks High higher than the state norm the norm. An estimated 39% of students are eligible for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. That share is lower than Sacramento County's rate of about 63%.

On a residual basis (actual vs predicted given the student mix), Cosumnes Oaks High tracks the demographic baseline. The model predicts 56.3% given the school's FRL share; actual proficiency is 54.3%.

Around the school, community-level numbers for Sacramento County indicate the typical household earns roughly $92,175 per year, 34% of adults hold a bachelor's degree or higher, and roughly 9% of residents live below the federal poverty line. Across Sacramento County's 387 public schools (combined enrollment of about 259,342 students), Cosumnes Oaks High is one campus in the mix.

The closest other public school is Elizabeth Pinkerton Middle, roughly 0.2 miles away. Within five miles, there are 8 other public schools. Among the 7 schools in that immediate cluster with test data (this one included), Cosumnes Oaks High ranks 4th on composite proficiency, beneath the local average of 56.8%.

Cosumnes Oaks High operates from a suburban location.

Over the past 7-year window. Looking back 7 years, enrollment at Cosumnes Oaks High has fell 10%, going from 2,350 students in 2018 to 2,109 in 2025. Asian enrollment moved from 27% to 43% across the same window. Class-load math has tightened: from 22.6:1 in 2018 to 21.4:1 in 2025.

On this page, members of the Cosumnes Oaks High community share and discuss pickup logistics, teacher feedback, and after-school programs. The community welcomes input from current and former families.