Sebastian Questa Elementary

Sebastian Questa Elementary, an expansive elementary-level community in Mountain House, California, part of Lammersville Joint Unified, works with 822 students, covering grades K through 8. Compared to the state average of about 465 students per school, that is 77% above typical.

Within Lammersville Joint Unified, which oversees 9 schools and 7,945 students, Sebastian Questa Elementary is one campus in the system.

For racial and ethnic makeup, Sebastian Questa Elementary lists that 65% of the student body identifies as Asian. Beyond that, the school logs 13% Hispanic, 10% White, 8% multiracial, 4% Black. The wider county runs roughly 19% Asian, putting the school's mix considerably more Asian than the area baseline.

On the resource side, The school currently runs with 37 full-time-equivalent teachers, for a student-teacher ratio near 22.3:1. That tracks the state average closely. An estimated 8% of students are eligible for free or reduced-price lunch, often used as a Title I proxy. By comparison, San Joaquin County runs at roughly 66%, so the school's eligibility rate is somewhat below the surrounding baseline.

With demographic context factored in, Sebastian Questa Elementary sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 74.7%; this one delivers 71.8%.

Across the wider county, census data for San Joaquin County shows the typical household earns roughly $92,179 per year, 23% of adults hold a bachelor's degree or higher, and census figures put the poverty rate at about 10%. Sebastian Questa Elementary is one of 251 public schools in San Joaquin County (combined enrollment of about 153,026 students).

Nearest neighbor: Altamont Elementary, around 0.4 miles off. Counting just inside five miles, 8 other public schools cluster around Sebastian Questa Elementary. Ranking that nearby cluster on reported proficiency puts Sebastian Questa Elementary at 4th of 8; the average score across the group is 72.7%.

Geographically, the school is in an outer-ring area.

Looking at the recent track record. Looking back 7 years, enrollment at Sebastian Questa Elementary has contracted 9%, going from 902 students in 2018 to 822 in 2025. The Asian share of enrollment grew from 55% to 65% over that span. Class-load math has tightened: from 24.6:1 in 2018 to 22.3:1 in 2025.

On this page, the page collects discussion, questions, and updates around science fair prep, picture-day reminders, and bus-route questions. Posting is open to anyone connected to the school.