Holbrook Language Academy

Holbrook Language Academy is an elementary-level community of middle-of-the-pack scale in Concord, California, one of the schools within Mt. Diablo Unified, caters to 501 students in grades K through 8.

Holbrook Language Academy is one of 50 schools operated by Mt. Diablo Unified, a district that hosts 29,210 students overall.

Demographically, Holbrook Language Academy logs that the largest single group is Hispanic, at 77% of enrollment. Other groups include 13% White, 6% multiracial, 4% Asian. The wider county runs roughly 28% Hispanic, putting the school's mix meaningfully more Hispanic than the area baseline.

On the income-and-resources front, Holbrook Language Academy shows 19 full-time-equivalent teachers, putting the student-to-teacher ratio at about 26.2:1. The state averages around 22.3:1, so this campus is higher than the state norm typical. Roughly 67% of students at Holbrook Language Academy qualify for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. By comparison, Contra Costa County runs at roughly 45%, so the school's eligibility rate is higher than the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), Holbrook Language Academy sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 39.8%; this one delivers 33.7%.

Across the wider county, ACS estimates for Contra Costa County put median household earnings sit near $127,229, about 45% of the adult population holds a bachelor's degree or above, and the poverty rate sits near 6%. Holbrook Language Academy is one of 280 public schools in Contra Costa County (combined enrollment of about 167,423 students).

The closest other public school is Glenbrook Academy, roughly 0.5 miles away. Within five miles, there are 8 other public schools. On composite proficiency, Holbrook Language Academy comes 1st of 4 in the immediate cluster, higher than the nearby-schools average of 19.6%.

Holbrook Language Academy operates from a suburban location.

Five-year trend. Holbrook Language Academy's enrollment has rose 165% since 2018, when it stood at 189 (now 501). Over the same period, the Hispanic share ticked up from 52% to 77%. Class-load math has loosened: from 20.3:1 in 2018 to 26.2:1 in 2025.

On allk12, the page collects discussion, questions, and updates around fundraisers, lost-and-found posts, and report-card season. Posting is open to anyone connected to the school.