Dennis B O'Brien Elementary School

Dennis B O'Brien Elementary School is one of the modestly sized elementary campuss in DOVER, New Jersey, one of the schools within Rockaway Township School District, with 298 students on its rolls from grades pre-K through 5. Enrollment runs roughly 26% leaner than the state mean of about 405.

Across the 6 schools in Rockaway Township School District (2,425 students total), Dennis B O'Brien Elementary School accounts for its share of the district's footprint.

Demographically, Dennis B O'Brien Elementary School reports that the largest single group is White at 39%, but no single group is in the majority. Beyond that, the school shows 31% Hispanic, 14% Asian, 11% Black, 5% multiracial. The wider county runs roughly 68% White, putting the school's mix visibly less White than the area baseline.

Looking at the economic backdrop, On paper, Dennis B O'Brien Elementary School has 32 full-time-equivalent teachers, translating to a class-load average of around 9.4:1. That figure is tighter than the state norm's 11.4:1 average. About 26% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment.

On a demographically-adjusted basis, Dennis B O'Brien Elementary School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 52.2%, the actual is 49.5%, a residual of -2.7 points.

In the surrounding community, the surrounding county (Morris County) shows that median household earnings sit near $137,326, roughly 58% of adults have completed at least a four-year degree, and roughly 3% of residents live below the federal poverty line. In all, Morris County runs 156 public schools (combined enrollment of about 72,239 students), of which Dennis B O'Brien Elementary School is one.

The closest other public school is Birchwood Elementary School, roughly 0.8 miles away. 8 of the 8 nearest public schools sit inside a five-mile radius. Among the 9 schools in that immediate cluster with test data (this one included), Dennis B O'Brien Elementary School ranks 4th on composite proficiency, above the local average of 41.2%.

Geographically, the school is in a bedroom-community area.

Trend over the last 7 years. Dennis B O'Brien Elementary School's enrollment has ticked down 11% since 2018, when it stood at 336 (now 298). Over the same period, the White share decreased from 52% to 39%. Class-load math has narrowed: from 11.4:1 in 2018 to 9.4:1 in 2025.

Within the allk12 community for this school, members of the Dennis B O'Brien Elementary School community share and discuss enrollment questions, classroom assignments, and PTA news. The community welcomes input from current and former families.