Mary Casey Black Elementary

Set in Brentwood, California, Mary Casey Black Elementary is a mid-tier elementary-level community, overseen by Brentwood Union. It serves 680 students across grades K through 5. Compared to the state average of about 465 students per school, that is 46% larger than typical.

Within Brentwood Union, which oversees 12 schools and 9,932 students, Mary Casey Black Elementary is one campus in the system.

In terms of who attends, Mary Casey Black Elementary reports that 45% of students identify as Hispanic, with the remaining enrollment distributed across several groups. Beyond that, the school logs 23% White, 15% Asian, 12% multiracial, 5% Black. The wider county runs roughly 28% Hispanic, putting the school's mix considerably more Hispanic than the area baseline.

In terms of school funding signals, On paper, Mary Casey Black Elementary has 27 full-time-equivalent teachers, translating to a class-load average of around 25.2:1. Statewide, the average ratio sits near 22.3:1, putting Mary Casey Black Elementary higher than the state norm the norm. About 47% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment.

With demographic context factored in, On a poverty-adjusted basis, Mary Casey Black Elementary sits in the bottom 10% statewide. Predicted proficiency from the FRL regression is roughly 51.5%; actual is 35.1%, a gap of -16.3 points.

In the surrounding community, the surrounding county (Contra Costa County) records that median household earnings sit near $127,229, roughly 45% of adults have completed at least a four-year degree, and census figures put the poverty rate at about 6%. Across Contra Costa County's 280 public schools (combined enrollment of about 167,423 students), Mary Casey Black Elementary is one campus in the mix.

Liberty High is the nearest neighboring public school, about 0.9 miles from this campus. 8 of the 8 nearest public schools sit inside a five-mile radius. Ranking that nearby cluster on reported proficiency puts Mary Casey Black Elementary at 5th of 5; the average score across the group is 48.2%.

Geographically, the school is in a suburban area.

Looking at the recent track record. Over the past 7-year window, the student count showed little movement: 668 students in 2018 compared to 680 in 2025. Over the same period, the Asian share climbed from 10% to 15%.

In the discussion threads here, the feed for Mary Casey Black Elementary typically covers enrollment questions, classroom assignments, and PTA news. The community welcomes input from current and former families.