Hartshorn School

As a reasonably sized primary school in SHORT HILLS, New Jersey, Hartshorn School teaches 392 students from grades K through 4, run under Millburn Township School District.

Across the 8 schools in Millburn Township School District (4,538 students total), Hartshorn School accounts for its share of the district's footprint.

For racial and ethnic makeup, Hartshorn School reports that the most-represented group is Asian (48%), with the rest of the student body spread across multiple groups. Beyond that, the school lists 38% White, 8% multiracial, 3% Hispanic, 2% Black. That is noticeably more Asian than the county at large, where the share is closer to 6%.

On the resource side, The school currently runs with 35 full-time-equivalent teachers, for a student-teacher ratio near 11.3:1. That tracks the state average closely. About 1% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. Set against Essex County (around 54%), the school's rate is meaningfully below typical.

On a demographically-adjusted basis, Hartshorn School sits in the top 10% of New Jersey schools after the BeatsExpectations adjustment. Predicted proficiency for the school's FRL share is roughly 65.7%; actual is 83.5%, +17.8 points clear of the demographic baseline.

In the area at large, the surrounding county (Essex County) reports that median household income runs about $80,789, roughly 39% of adults have completed at least a four-year degree, and the poverty rate sits near 11%. In all, Essex County runs 249 public schools (combined enrollment of about 145,473 students), of which Hartshorn School is one.

The closest other public school is Glenwood School, roughly 0.7 miles away. Within five miles, there are 8 other public schools. On composite proficiency, Hartshorn School comes 2nd of 9 in the immediate cluster, higher than the nearby-schools average of 78.8%.

Geographically, the school is in a suburban area.

Trend over the last 7 years. Over the past 7-year window, the student count contracted 7%: 423 students in 2018 compared to 392 in 2025. White enrollment moved from 55% to 38% across the same window. The student-to-teacher ratio narrowed from 12.8:1 in 2018 to 11.3:1 today.

On the community side, recent activity here tends to focus on science fair prep, picture-day reminders, and bus-route questions. Anyone with firsthand experience at this school can post or comment.